Design as Predictive Model Acquisition: Toward a Unified Theory
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2026
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| _version_ | 1866901220990386176 |
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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> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_18389362 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| 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 |