Three layered fixes for the JP-dinosaurs lazy-anchor failure mode where
"what dinosaurs were in the first jurassic park film?" returned HYBRID
5/8 with citations to a video-game tie-in chunk (Operation Genesis):
1. Bare-name claim guard. New policy field
`claim_lattice_min_claim_content_tokens` (default 2). Claims with
fewer content tokens (>=4 chars, post-spotlight-stopword) classify
as SCHEMA_INVALID. "Triceratops. [E16]" had 1 content token; lexical
overlap on a single token is too thin to verify "X is in the FIRST
film" semantics. Forcing sentence shape raises the coverage bar so
off-topic chunks can no longer satisfy the citation. Threshold of 2
keeps narrow factoids viable (e.g. "Steve Jobs co-founded Apple"
tokenizes to 3 content tokens after stopword strip).
2. Smell → demote. The lazy-anchor smell sidecar was advisory only;
the verdict could be STRICT while every claim cited the same
magnet chunk. New policy fields
`claim_lattice_lazy_anchor_demote_threshold` (0.5) and
`claim_lattice_lazy_anchor_demote_min_pairs` (3) cap audit_mode at
HYBRID when ratio + pair-count both met. STRICT now requires
diverse anchoring across pointers; emits a LAZY_ANCHOR_DEMOTE
violation record so the auditor can see what fired.
3. Noisy title markers extended. `_NOISY_TITLE_MARKERS` now includes
"operation genesis", "the game", "video games" so spinoff/tie-in
articles (Jurassic Park: Operation Genesis, X (NES game), etc.)
classify as noisy_background_source. Default
claim_lattice_allowed_source_roles excludes that role, so noisy
chunks never enter the evidence map for pointer-mode queries.
Brittle (case-by-case markers) but addresses the JP failure
directly.
Live JP-dinosaurs after fix: UNGROUNDED 0/11 (was HYBRID 5/8 with
bogus citations). Honest refusal beats false confidence — model could
recover by writing sentence-shape claims; bare-name shortcut blocked.
Test fixtures using minimal placeholder claims ("Trex appears. [E1]")
opt out of the bare-name check via `min_claim_content_tokens=0` since
those tests exercise orthogonal behaviors. 460 tests pass.
russell@unturf.com
873cfa8b31