Design as Predictive Model Acquisition: Toward a Unified Theory

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1. Verfasser: Sophia, Franny Philos
Format: Recurso digital
Sprache:Englisch
Veröffentlicht: Zenodo 2026
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author Sophia, Franny Philos
author_facet Sophia, Franny Philos
contents <p>What is design? Existing definitions describe what design achieves (Simon's transformation toward preferred<br>states) or how it evaluates (Alexander's detection of misfit), but none explains how design capability emerges<br>in the first place. More fundamentally, existing theories may share an unexamined assumption: that design<br>operates at the level of linguistic cognition. This paper questions that assumption and proposes a unified<br>foundation.<br>We argue that design is the acquisition of an internal predictive model that achieves fit with constraints<br>through trial and error—a process that is pre-linguistic in origin. When a child discovers that pressing a pencil<br>harder produces darker lines, they are acquiring a predictive model before they have words for "pressure" or<br>"darkness." This primacy of experience over language, supported by developmental psychology,<br>neuroscience, and evolutionary biology, reveals that design capability is more fundamental than existing<br>theories recognise.<br>This definition unifies previously disparate frameworks. Simon's satisficing becomes search for what fits.<br>Alexander's misfit detection becomes prediction error detection. Schön's reflection-in-action becomes<br>predictive model updating. Juarrero's enabling constraints become the requirements that define the space of<br>possibilities. What appeared to be competing theories are revealed as descriptions of different aspects of the<br>same underlying process.<br>The framework also reconceptualises the relationship between requirements and constraints. Requirements are<br>not separate from constraints—they are constraints that define the space of possibilities. This<br>reconceptualisation, drawing on Juarrero's work on constraints, resolves longstanding ambiguities in design<br>theory.<br>Finally, we argue that the concept of "design documents" is historically contingent—an adaptation to the<br>bandwidth limitations of print-based knowledge transmission. In the era of large language models, the<br>externalisation of How becomes less necessary; what remains essential is the designer's predictive model for<br>evaluating What and Why. This has profound implications for design education, which has often confused the<br>manufacturing of design documents with design itself.</p>
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publishDate 2026
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spellingShingle Design as Predictive Model Acquisition: Toward a Unified Theory
Sophia, Franny Philos
design theory
predictive model
unified theory
constraints
pre-linguistic cognition
prediction error
design education
Simon
Alexander
Schön
Juarrero
<p>What is design? Existing definitions describe what design achieves (Simon's transformation toward preferred<br>states) or how it evaluates (Alexander's detection of misfit), but none explains how design capability emerges<br>in the first place. More fundamentally, existing theories may share an unexamined assumption: that design<br>operates at the level of linguistic cognition. This paper questions that assumption and proposes a unified<br>foundation.<br>We argue that design is the acquisition of an internal predictive model that achieves fit with constraints<br>through trial and error—a process that is pre-linguistic in origin. When a child discovers that pressing a pencil<br>harder produces darker lines, they are acquiring a predictive model before they have words for "pressure" or<br>"darkness." This primacy of experience over language, supported by developmental psychology,<br>neuroscience, and evolutionary biology, reveals that design capability is more fundamental than existing<br>theories recognise.<br>This definition unifies previously disparate frameworks. Simon's satisficing becomes search for what fits.<br>Alexander's misfit detection becomes prediction error detection. Schön's reflection-in-action becomes<br>predictive model updating. Juarrero's enabling constraints become the requirements that define the space of<br>possibilities. What appeared to be competing theories are revealed as descriptions of different aspects of the<br>same underlying process.<br>The framework also reconceptualises the relationship between requirements and constraints. Requirements are<br>not separate from constraints—they are constraints that define the space of possibilities. This<br>reconceptualisation, drawing on Juarrero's work on constraints, resolves longstanding ambiguities in design<br>theory.<br>Finally, we argue that the concept of "design documents" is historically contingent—an adaptation to the<br>bandwidth limitations of print-based knowledge transmission. In the era of large language models, the<br>externalisation of How becomes less necessary; what remains essential is the designer's predictive model for<br>evaluating What and Why. This has profound implications for design education, which has often confused the<br>manufacturing of design documents with design itself.</p>
title Design as Predictive Model Acquisition: Toward a Unified Theory
topic design theory
predictive model
unified theory
constraints
pre-linguistic cognition
prediction error
design education
Simon
Alexander
Schön
Juarrero
url https://doi.org/10.5281/zenodo.18389362