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feat(Semantics/Composition): intensions in the engine, real IFA - #5869

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hawkrobe merged 2 commits into
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refactor/intensional-1027j
Oct 27, 2026
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hawkrobe merged 2 commits into
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refactor/intensional-1027j

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@hawkrobe hawkrobe commented Oct 27, 2026 •

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The composition engine interprets relative to a world, and intensional application gives the function its argument's whole intension (von Fintel & Heim (25), Heim & Kratzer (9) p. 308).

  • Mode.intension, Term.intension, Tree.intension; the existing evaluation is their case of a lexicon that does not vary with the world; Mode.forall_eval_intensionalLeft_eq_iff ties constant-intension application to extensionality (refactor(Semantics/Composition): extensional operators via DependsOn #5866)
  • HeimKratzer1998 Chapter 12: (8) derived from its tree, the p. 300 problem, believe's nonextensional context via the box theorem, (11) consistent (p. 309)
  • Semantics/Composition/ headers and docstrings rewritten in textbook register at mathlib length

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github-actions Bot enabled auto-merge (squash) October 27, 2026 20:40
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hawkrobe disabled auto-merge October 27, 2026 20:43
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github-actions Bot enabled auto-merge (squash) October 27, 2026 20:50
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hawkrobe disabled auto-merge October 27, 2026 20:55
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hawkrobe merged commit 9be79cb into main Oct 27, 2026
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hawkrobe deleted the refactor/intensional-1027j branch October 27, 2026 20:55
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