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Linglib.Semantics.ArgumentStructure.Projection

The Dowty→Grimm projection ([Gri11] §2.1) #

The morphisms from [Dow91]'s EntailmentProfile to [Gri11]'s lattice objects: Agentivity.fromEntailmentProfile (the four P-Agent features minus independent existence), PersistenceLevel.fromPatientProfile (the P-Patient entailments read as persistence), and their pairing ParticipantType.fromSubjectProfile / fromObjectProfile.

The consistency theorems make the projection exact: its kernel (fromEntailmentProfile_eq_iff), its monotonicity, the decomposition of Dowty's flat count through it (pAgentScore_decomposition), dominance as lattice order plus independent existence (pAgentDominates_iff), and the Argument Selection Principle as lattice dominance (outranks_of_lattice_dominance).

Map Dowty's P-Agent entailments to Grimm's agentivity features.

The correspondence is direct for 3 of 4 features:

  • volition = volition
  • sentience = sentience
  • causation → instigation (p.521)
  • movement = motion

Independent existence is handled by the persistence dimension.

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    Two profiles project to the same agentivity node iff they agree on the four lattice features: the projection drops independent existence and all five Proto-Patient entailments ([Gri11] §2.1 recasts them on the persistence axis).

    Map Dowty's P-Patient entailments to Grimm's persistence level.

    This is an approximate mapping — Grimm's system is genuinely different from Dowty's. The diagnostic features:

    • DE + IT → exPersEnd: entity created incrementally (build, invent)
    • DE + ¬IT → exPersBeginning: entity ceases to exist (die, evaporate)
    • IT + ¬DE → exPersBeginning: entity consumed incrementally (eat)
    • CoS + ¬IT + ¬DE → quPersBeginning: changed but persists (move, dim)
    • ¬CoS + ¬DE → totalPersistence or totalNonPersistence

    Dowty's DE ("does not exist independently of the event") maps to Grimm's creation/destruction axis. IT (incremental theme) disambiguates: DE+IT = creation (exPersEnd), DE+¬IT = destruction (exPersBeginning).

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      Map a full EntailmentProfile to a ParticipantType.

      The agentivity features come from the P-Agent entailments; the persistence level comes from the P-Patient entailments.

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          Grimm ↔ Dowty ASP consistency #

          Grimm's agentivity lattice ordering is consistent with Dowty's PAgentDominates: if Grimm a ≤ Grimm b on agentivity, then Dowty a dominates Dowty b on P-Agent features.

          This holds because the feature-to-feature mapping is a bijection on the first 4 P-Agent features (volition, sentience, causation=instigation, movement=motion).

          theorem ArgumentStructure.fromEntailmentProfile_monotone (p q : EntailmentProfile) (hv : p.volition = trueq.volition = true) (hs : p.sentience = trueq.sentience = true) (hc : p.causation = trueq.causation = true) (hm : p.movement = trueq.movement = true) :

          The Dowty→Grimm projection is monotone: if one EntailmentProfile dominates another on P-Agent features, the projected agentivity values are ordered.

          Dominance is lattice order plus independent existence #

          [Dow91]'s five P-Agent entailments (Table 1 of [Gri11]) split into [Gri11]'s four agentivity primitives (Table 2) plus independent existence, which Grimm recasts on the persistence axis (§2.1). The three theorems below make the split exact: the flat count decomposes through the projection, the lattice's feature count is monotone in the inclusion order (§2.3: higher in the lattice = higher degree of agentivity), and Dowty's PAgentDominates is precisely lattice order plus an independent-existence implication (§2.2).

          Feature count is monotone in the inclusion order ([Gri11] §2.3): ascending the Fig. 1 lattice never loses agentivity features.

          Dowty's flat P-Agent count decomposes through the projection: the four lattice features ([Gri11] Table 2) plus independent existence, the one Table 1 entailment Grimm moves to the persistence axis (§2.1).

          Dowty's subset dominance is exactly Grimm's lattice order plus an independent-existence implication ([Gri11] §2.2, Fig. 1): the projection loses no dominance information. Derived from fromEntailmentProfile_monotone and grimm_agentivity_consistent_with_dowty.

          [Gri11]'s Argument Selection Principle as lattice dominance: if subj's agentivity node strictly dominates obj's and independent existence is preserved, subj is selected — for every profile pair, via pAgentDominates_iff, not per-verb checking.