Constraint, Resolution, and the Stubbornness of Experience
I. The Solidity Riddle
Any experience-first view of reality faces an immediate objection.
If reality is constituted in experience, why can’t I change it at will? Why does a table resist my hand? Why does a wall stop my body? Why does it hurt when I kick a stone?
This is the old Dr. Johnson objection. When Bishop Berkeley denied that matter existed as a mind-independent substance, Samuel Johnson is said to have kicked a stone and declared, “I refute it thus.” The gesture still carries force. Whatever our metaphysics, the world pushes back.
At first glance, this seems fatal to any view that begins from experience. If reality appears within experience, then why does experience not behave like imagination? Why can I imagine walking through a wall, but not actually do it? Why can a dream scene shift instantly, while waking life holds firm? Why does reality feel given, resistant, and stubbornly non-optional?
The answer is constraint.
Experience is not an open field in which anything can happen. It is structured. It has degrees of freedom, but it also has limits. Some expressions can hold together as a coherent lived scene; others cannot. Some possibilities remain viable under perception, memory, action, and re-checking; others collapse before they can become a world.
This article argues that solidity is not an extra property injected into experience from outside. Solidity is what constraint feels like from the inside.
The table feels solid because the experience “my hand passes through the table” cannot resolve under the active constraints of ordinary waking life. The wall feels solid because the experience “my body moves through the wall without injury or disruption” cannot hold together within the public spatial ordering we inhabit. The stone hurts because bodily integrity is one of the deep organizing constraints of embodied experience, and pain is the felt announcement that this constraint is being pressed.
This does not mean the world is fake, imaginary, or optional. It means the opposite. The world feels real because experience is not arbitrary. It resolves under conditions that are far deeper than personal belief or momentary desire.
To understand why reality feels solid, we must first clear up a confusion.
II. Constructed Does Not Mean Chosen
Experience-first views are often misunderstood because of the word “constructed.”
If reality is “constructed,” people assume it must be made up. If the world is shaped by experience, they assume it should be freely changeable. If the physical world is not treated as a mind-independent substrate standing outside experience, they assume it becomes a kind of dream.
That does not follow.
A bridge is constructed, and it is solid. A mathematical proof is constructed, and it can be rigorous. A legal system is constructed, and it can constrain lives for generations. Construction does not mean fantasy. It means that something takes form through ordering conditions.
Nor does constructed mean socially negotiated. A table is not solid because people agree to call it solid. Agreement itself is downstream of constraint. We do not agree because reality is optional; we agree because most alternatives are not viable under shared conditions.
The same is true for individual experience. You do not choose most of what appears. You do not choose the color field in front of you, the resistance of the floor beneath your feet, the rhythm of your breathing, the limits of your body, or the continuity of the room around you. You may influence attention, interpretation, posture, mood, and action. But you do not generate the basic stability of the scene by personal decree.
This is because choice operates only within what the active constraints leave open.
You can choose to look left or right. You cannot choose to see ultraviolet light with unaided human vision. You can choose to interpret an ambiguous remark generously or suspiciously. You cannot choose to understand a language you have never learned. You can choose to lift your arm. You cannot choose to float upward by intention alone.
This distinction is essential. Experience is shaped, but not arbitrary. Constructed, but not chosen. Observer-relative, but not private fantasy.
The solidity of the world comes from the fact that experience must resolve into a coherent form. Not every candidate expression can do that. Most possibilities are excluded before they ever become livable. What remains is not whatever we wish, but whatever can hold together under the constraint stack.
III. The Constraint Stack
A moment of experience does not arrive as an undifferentiated blur. It has a definite profile. There is a body here, a room around it, a world that continues beyond the edge of attention, and a range of actions that appear possible or impossible.
Some actions are available. Others are not. Some interpretations fit the scene. Others strain against it. Some possibilities can be entertained in imagination, but cannot resolve as the world one is actually living.
We can describe this profile in terms of a constraint stack.
The term is plain. A constraint stack is the layered set of conditions that determines which expressions of experience can hold together and which cannot. It is not one mechanism. It is not merely belief. It includes everything from deep public regularities to personal expectation.
A few definitions will help.
Resolution names the condition in which one viable expression holds together as the lived scene under the active constraints. It is not a voluntary choice and not a logical proof. It is the coherence of a scene that can be lived, re-encountered, and acted within.
Viable means able to cohere under the relevant constraints. A viable expression can survive cross-checks: shifts of attention, action-feedback, bodily engagement, memory, and practical re-encounter.
Public ordering means the high-overlap, high-redundancy domain of experience: the region where many independent checks converge on the same distinctions. In ordinary language, we call this the physical world. In this framework, “physical world” does not mean a substrate outside experience. It means the stable public ordering that experience resolves into under strong, repeatable constraints.
The constraint stack includes several layers.
Deep structural constraints
At the broadest level are constraints that remain invariant within the public ordering we inhabit. These include continuity, regularity, spatial coherence, and the reliable linkage between action and consequence.
In ordinary language, we often summarize these as physical laws. In this framework, that phrase points to the most persistent regularities of public resolution: constraints that any ordinary experience must respect while it remains within this ordering, and constraints that scientific modeling captures with extraordinary precision.
These constraints are not personal. They do not yield to belief. They are part of what makes a stable public world possible at all.
Biological constraints
Next are constraints imposed by the kind of organism you are.
Human vision has a certain range. Human hearing has a certain range. Human joints bend in some directions and not others. The nervous system organizes perception and action in ways that make some experiences effortless and others unavailable.
Your body is not merely something you observe. It is part of the constraint machinery through which a world becomes livable.
Perceptual constraints
Within biology are more specific perceptual regularities: depth cues, object boundaries, figure-ground distinction, color constancy, motion continuity, and object permanence.
These are not conclusions you draw after inspecting neutral data. They are part of how the scene resolves in the first place. You do not infer a three-dimensional room from scratch every time you open your eyes. The room appears already organized.
Contextual constraints
Each moment is embedded in a context. You remember where you are, what you were doing, what kind of situation this is, what counts as plausible, and what would break the scene.
This does not require time to be fundamental in an ultimate metaphysical sense. The point is simpler: present experience includes records, memory, expectation, and contextual continuity. These constrain what can happen next.
You cannot simply find yourself on the Moon while sitting in your kitchen, not only because of physics in the narrow sense, but because such a shift would break the whole contextual structure that allows the present scene to remain intelligible as this scene.
Learned and cultural constraints
Language, training, categories, and skills of attention narrow the field further.
A trained musician hears structure where a novice hears noise. A radiologist sees a fracture where others see a blur. A chess master sees pressure, threat, and position where a beginner sees pieces.
These are not merely private associations. They are learned constraints that shape what can appear as salient, meaningful, and stable.
Personal constraints
Finally, there are personal expectations, fears, desires, habits, memories, and beliefs. These matter. They shape what we notice, what we ignore, what we dread, what we hope for, and what we take as plausible.
But they are not sovereign. Personal constraints operate within the larger stack. They matter most when a situation is ambiguous. They rarely override the deeper constraints that stabilize ordinary public reality.
This is why imagination is freer than perception. In imagination, fewer constraints are active. In ordinary waking life, many layers converge at once. The result is a scene that feels given because most alternatives never become viable.
IV. Resolution and the Path of Least Constraint
The world feels solid when the constraint stack converges.
When many layers support the same expression, that expression resolves with little effort. It becomes the lived scene. Alternatives may be thinkable, but they cannot hold. They are excluded by the combined pressure of perception, body, memory, action, and public regularity.
This is why waking experience usually feels less like invention and more like discovery. The scene is not created by a conscious act of will. It resolves because the active constraints allow only a narrow band of coherent possibilities.
The phrase “path of least resistance” is useful here, but we can make it more precise. Experience tends to resolve along the path of least constraint conflict. The viable scene is the one that can satisfy the most active constraints at once.
If you see a cup on a table, reach for it, feel its surface, lift it, hear it clink against another cup, and watch another person use it, many independent channels converge. Vision, touch, proprioception, sound, action-feedback, memory, and shared practice all support the same expression. The cup becomes part of the public ordering. It is not merely an image. It is a stable node in a constraint-rich scene.
By contrast, if you briefly think you see a face in a shadow, the expression may appear for a moment but fail under re-check. You look again, shift your angle, turn on a light, and the face dissolves. It was not unreal as an experience. It appeared. But it lacked solidity because it could not survive enough independent checks.
Solidity, then, is not the same as vividness. A hallucination, dream, or fantasy can be vivid. It can be emotionally intense. It can even be unforgettable. But vividness alone does not make something solid in the public sense. Solidity requires robustness under re-checking. It requires persistence across multiple channels of constraint.
This distinction will matter later. For now, it explains why ordinary reality has its characteristic feel. It is not merely bright or detailed. It is resistant. It can be probed, re-encountered, acted upon, and corrected by feedback.
That resistance is constraint made experiential.
V. Why You Can’t Walk Through Walls
Now we can face the obvious challenge directly.
If reality is constituted in experience, why can’t you walk through a wall?
The usual answer is that the wall is made of mind-independent matter, and that matter enforces itself on you. That model works well for ordinary prediction and engineering. But an experience-first account asks a more basic question:
What would “walking through a wall” have to mean as a lived scene?
It would not be a single isolated event. It would require many conditions to remain coherent at once:
- your body continues to function as a body;
- spatial perception remains stable;
- the wall remains a wall in the same public sense;
- your movement remains intelligible as bodily movement;
- contact, resistance, and injury somehow do not occur;
- memory and contextual continuity remain intact;
- the surrounding public ordering remains coherent;
- other possible observers could still coordinate with what happened.
That combination is not viable under the ordinary constraint stack.
The problem is not that you lack enough belief. The problem is that the candidate scene cannot satisfy the deeper constraints that make embodied spatial experience coherent. Within the public ordering we inhabit, extended bodies do not pass through extended walls while preserving the ordinary meanings of body, wall, movement, contact, and continuity.
The wall’s resistance is not added to experience from outside. It is the felt signature of a dominant resolution. The viable scene is the one in which the wall functions as an obstacle, the body functions as vulnerable, and contact produces predictable consequences.
Trying harder does not help because effort acts mostly on higher-level constraints. It can shift attention. It can alter interpretation. It can help you overcome fear. It can refine skill. But it cannot make a non-viable expression coherent under the deeper layers of the stack.
You can strain to see the hidden figure in a puzzle image. You cannot strain your way into phasing through concrete while preserving a coherent public world around you.
The same point appears in less dramatic examples. You cannot will your eyes to focus at any distance instantly. You cannot decide to feel rested after no sleep. You cannot make yourself fluent in a language you have never learned by wanting it strongly enough.
These limits are not punishments. They are the shape of viability under constraint.
Walls are simply the extreme case. They are supported by nearly every layer of the stack: deep public regularity, bodily organization, spatial perception, action-feedback, memory, and shared practice. That is why they feel so uncompromising.
VI. Why It Hurts
The same framework helps explain pain.
Pain is often treated as a signal produced by the body and delivered to the mind. That is a useful public description. But from the lived standpoint, pain is not first encountered as a signal. It is encountered as a boundary.
Pain is what it feels like when the coherence of the body’s viable organization is threatened, strained, or disrupted.
If you press your hand gently against a wall, you feel contact. If you press harder, resistance intensifies. If the pressure crosses a threshold, pain appears. The scene now includes an urgent constraint: do not continue in this way.
In public functional terms, pain can be modeled as an error-like signal related to bodily integrity. It marks tissue stress, threat, injury, or possible damage. It reorganizes attention and action around protection.
In lived terms, pain is more immediate. It is the felt insistence of a limit.
This is why pain has its peculiar authority. It is difficult to ignore because it is not merely information about a boundary. It is the boundary appearing within experience as urgency. It narrows the field. It reorganizes priorities. It makes certain continuations less viable.
Pain also shows why solidity is not merely visual or spatial. Reality feels solid because the body is involved. The body is the intimate center of constraint. It is where public ordering becomes personal, where resistance is not just observed but felt.
A wall is not solid in the abstract. It is solid relative to embodied action. It blocks, presses, bruises, injures, and forces reorientation. Solidity is the lived consequence of a constraint stack in which body and world cohere tightly enough that violation has felt cost.
VII. Ambiguity: When More Than One Resolution Is Viable
Not every experience is as tightly constrained as a wall. Some situations allow more than one viable expression.
Visual ambiguity makes this easy to see. Consider the Necker cube. The same lines can resolve into one three-dimensional orientation or another. Or consider the duck-rabbit image. The same marks can appear as a duck, then as a rabbit.
These examples are not exceptions to the rule. They reveal the rule.
They show that definiteness is not simply given in advance. It is achieved through resolution under constraint.
In these cases, the sensory input is underconstrained. More than one organization can satisfy the active constraints:
- the marks on the page support more than one interpretation;
- perceptual organization can stabilize either form;
- contextual continuity does not strongly prefer one;
- no immediate action requires a fixed answer;
- learned categories allow both possibilities.
As a result, the scene can reconfigure.
Reconfiguration names a shift in constraint dominance such that a different viable expression holds together as the lived scene.
The sensory input may not change. The paper remains the same. The lines remain the same. But the experience shifts. Duck becomes rabbit. One cube orientation becomes another.
The transition often has a snapping quality. You do not usually experience a smooth blend from duck to rabbit. You experience one, then the other. This suggests that experience resolves into distinct viable basins: stable organizations that can be occupied as lived scenes, but not easily combined.
Ambiguity also shows why attention matters. You can sometimes invite a different resolution by shifting attention, changing context, or being told what to look for. Higher-level constraints can tip the balance when deeper constraints leave room.
But ambiguity has limits. The duck-rabbit can become a duck or a rabbit. It cannot become anything whatsoever. The range of possible resolutions is still constrained by the marks, the perceptual system, learned categories, and the surrounding context.
This is the key lesson.
Experience is neither fixed in every detail nor freely invented. It is constrained possibility. Some scenes are tightly resolved. Others remain open to reconfiguration. The difference lies in how strongly the constraint stack converges.
VIII. Action Tightens Reality
Action is one of the strongest ways constraints become solid.
When you only look at an ambiguous image, more than one resolution can remain viable. But when you must act, the space narrows. Action requires a definite target, a definite body, and a definite feedback loop.
Suppose the duck-rabbit were not a drawing, but a living creature in front of you. If you had to feed it, avoid its bite, or pick it up, ambiguity would not remain harmless for long. Your action would probe the scene. Touch, movement, resistance, sound, and consequence would add constraints. The viable resolution would tighten.
This is true of ordinary life. The world becomes solid not only because it appears, but because we act within it. We walk, reach, grasp, push, lift, avoid, repair, and test. Each action brings feedback. Each feedback loop eliminates some possibilities and reinforces others.
This is why embodied engagement matters. A purely visual scene can be ambiguous in ways an actionable scene cannot. A mirage can shimmer at a distance, but it fails under approach. A shadow can look like a step, but your foot finds the floor. A suspected object can become confirmed when it resists your hand.
Action is not secondary. It is one of the primary means by which experience re-resolves.
This also explains why scientific instruments are so powerful, even though the full account of public agreement belongs to the next article. Instruments extend action-feedback. They let us probe distinctions that unaided perception cannot stabilize. A thermometer, microscope, or voltmeter adds a reliable constraint channel. It narrows what can resolve as “the reading.”
Even for a single observer, instruments harden reality. They turn loose impressions into stable distinctions. They make some possibilities easier to re-check and others harder to sustain.
Solidity grows where probing becomes redundant.
IX. Dreams and the Loss of Solidity
The contrast with dreams is revealing.
Dreams can be vivid. They can contain color, sound, movement, emotion, danger, desire, and pain. While dreaming, the scene may feel compelling. But dreams often lack the kind of solidity that characterizes waking life.
Why?
Because the constraint stack is less tightly aligned.
In dreams, contextual continuity often loosens. A place can become another place without transition. A person can shift identity. A goal can appear without a stable past. Contradictions that would break waking experience may pass unnoticed.
Action-feedback is also altered. You may run without moving properly, speak without stable consequence, or confront a threat without the normal bodily channels of escape. Re-checking is weak. You do not usually test the dream world through sustained, independent probes.
This does not make the dream “nothing.” It is an experience. It can matter deeply. It can reveal emotional structures, fears, desires, and unresolved meanings. But it is not solid in the same way waking life is solid because it is not supported by the same density of constraints.
The important distinction is again vividness versus solidity.
A dream may be vivid but shallowly constrained. Waking life is often less dramatic but more robust. It persists under re-encounter. It survives shifts of attention. It answers action with stable consequence. It is embedded in memory and public ordering.
This is why waking up often has the feeling of returning to a narrower track. The field of possibility tightens. The bedroom, the body, the day, the memory of who one is and what one must do all return as a dense constraint structure.
The waking world is not more real because it is less experiential. It is more solid because it is more constrained.
X. Breakdown States and Thin Reality
Dreams are not the only cases where solidity weakens. There are waking states in which the usual constraint stack loosens, fragments, or decouples.
This can happen in delirium, extreme stress, sensory deprivation, dissociation, acute confusion, or severe psychological disorganization. These are descriptive categories, not moral judgments. They name ways in which the ordinary alignment of experience can weaken.
Such states may be meaningful and experientially powerful. The point is not to dismiss them as “less real.” The point is to understand why they often feel unstable, unreal, flooded, fragmented, or dreamlike.
Several things can happen.
Constraints loosen
Interpretations that would normally be excluded may become available. The scene admits possibilities that ordinary waking constraints would not support. Associations become freer. Salience spreads. Meaning attaches too easily or too strangely.
Constraints fragment
Different layers of the stack stop supporting the same resolution. Perception may suggest one pattern, bodily feeling another, memory another, interpretation another. Instead of converging into one stable scene, the layers pull apart.
The result can be a feeling of unreality: the world is seen, but not fully inhabited; present, but not anchored.
Constraints decouple
Perception, action, and contextual continuity may stop reinforcing one another. In sleep paralysis, for example, perception is active while voluntary motor action is unavailable. The person cannot use action-feedback to probe and re-stabilize the scene in the usual way.
In dissociative states, the world may appear visually intact but feel unreachable or hollow. The channels that normally bind seeing, acting, feeling, and contextual belonging are weakened.
When these changes accumulate, solidity diminishes. The scene may remain vivid, but it becomes less robust under re-checking. It may be compelling in patches but unable to sustain the full density of ordinary reality.
In a standard realist picture, such states are usually described as failures to represent an external world accurately. That description can be useful in clinical and practical contexts. But from the present perspective, we can describe the same phenomena more directly as failures or alterations of resolution.
The constraint stack no longer enforces the narrow, stable band of viable expression that normally yields solidity.
This helps explain why grounding practices can help in some cases. Touching an object, naming the room, feeling the feet on the floor, orienting to the present, speaking with another person, or engaging in simple action can restore constraint coupling. These practices add redundancy. They bring perception, body, language, and context back into alignment.
Reality feels solid again when the stack re-converges.
XI. What Solidity Is Not
This framework can be misunderstood, so several limits should be stated clearly.
Solidity is not proof of mind-independent matter
When a stone resists your foot, the resistance is real. But the fact of resistance does not force one metaphysical interpretation. The usual realist model says the stone is made of mind-independent matter. That model is powerful and often useful. But an experience-first view asks what the resistance means within experience.
In these terms, the stone rebounds because the constraint stack includes invariants that do not yield. The experience “my foot passes through the stone without consequence” is not viable in the ordinary public ordering. The stone’s solidity is the felt result of that non-viability.
The point is not to deny the stone. It is to understand the stone as part of the stable public ordering of experience, rather than as a metaphysical object outside experience that somehow later appears within it.
Solidity is not mere belief
Belief can shape perception, especially in ambiguous situations. But belief is only one layer of the stack. The deepest constraints are not personal opinions. You cannot believe away gravity, fatigue, injury, or the limits of perception.
This is why experience-first metaphysics should never be confused with wishful thinking. Personal intention has power only where the larger stack leaves degrees of freedom open.
Solidity is not social agreement
The world is not solid because people agree that it is solid. Agreement becomes possible because the same kinds of constraints keep forcing compatible resolutions.
This article has focused mainly on the single-observer side: why the world feels resistant from within experience. The next question is why different observers converge on a shared world. That requires a further idea: constraint-coupling. But even before that, we can see that solidity is not created by consensus. It arises from viability under constraint.
Solidity is not the same as vividness
A dream can be vivid. A hallucination can be vivid. A memory can be vivid. An image can be vivid. But solidity requires robustness across independent checks.
The more a scene survives attention, action, memory, bodily engagement, and re-encounter, the more solid it feels. The fewer channels support it, the more fragile it becomes.
Solidity is not absolute
The ordinary world feels solid because its constraints are deeply aligned. But not every feature of experience is equally constrained. Some domains are rigid. Others are fluid. Physical resistance is highly constrained. Meaning is more flexible. Mood is still more fluid. Imagination is freer still.
Reality is not one uniform block. It has gradients of solidity.
This is why one can reinterpret a social situation but not walk through a wall; change the emotional tone of an event but not erase the event from public continuity; imagine a different body but still feel the limits of this one.
The constraint stack is layered, and different layers leave different freedoms.
XII. Conclusion: Solidity as Tight Resolution
The question was simple:
If reality is constituted in experience, why does it feel so stubbornly real?
The answer is constraint.
Experience does not float freely. It resolves under layered conditions: deep public invariants, biological limits, perceptual organization, contextual continuity, learned categories, and personal expectations. These layers determine which expressions can hold together as a coherent lived scene.
When the layers converge tightly, reality feels solid. Alternatives may be imaginable, but they cannot resolve. They fail under re-checking, action, bodily engagement, or contextual continuity. The scene returns again and again to the same narrow band of viable expression.
This is why a wall blocks the body. This is why a stone hurts the foot. This is why waking life differs from dream. This is why ambiguity can flip in perception but not overturn the whole public ordering. This is why personal belief can shape interpretation without rewriting the deep structure of experience.
Solidity is not an extra substance added to experience. It is the felt signature of constraint dominance.
The world feels given because most alternatives are not viable. It feels resistant because action meets boundaries. It feels stable because perception, body, memory, and feedback repeatedly support the same resolution.
In the language of the broader framework: Awareness is the field in which anything appears; Ordering is the constraint structure that gives experience its definite shape; Potential is the openness from which multiple expressions may be possible. Reality feels solid where Ordering narrows Potential into one coherent, livable scene.
So Dr. Johnson’s kick does not refute an experience-first view. It reveals what such a view must explain: not why matter exists outside experience, but why experience contains constraints so deep that some possibilities cannot be lived.
The stone resists because the scene is tightly resolved.
Solidity is tight resolution under stacked constraints.