Handler Imprinting (Ellipsis Manual, 2017 — operator-as-parent-figure bonding, explicitly analogized by the source itself to animal ethology) shares its exact name with Imprinting (Janov primal-pain cellular imprinting, a completely unrelated mechanism already in the vault). This is the identical shape of collision the vault already solved once: Fractionation (compliance-escalation) vs. hypnotic trance-depth-cycling fractionation vs. a third, more general emotional-state-cycling fractionation — three unrelated mechanisms sharing one word, each requiring an explicit non-merge disambiguation note rather than a silent pick-one resolution.
The echo worth naming: both collisions come from the same underlying cause — Hughes (and behavioral-mechanics writers generally) borrow real, established technical vocabulary from adjacent fields (ethology, hypnosis, NLP) and repurpose it for a narrower tactical meaning, without renaming it. The vault keeps discovering the same category of naming problem one word at a time (Corrugation, Fractionation, Imprinting, Three Selves) rather than as a recognized pattern.
Possible concept-page candidate, not yet built: "Borrowed Technical Vocabulary and the Behavioral-Mechanics Naming-Collision Problem" — a meta-page cataloging every instance of this pattern found so far (Corrugation ×2, Fractionation ×3, Imprinting ×2, Three Selves ×2) as its own citable phenomenon, useful for anyone doing a future LINT pass who needs to know where these landmines already are. Hold until a 5th or 6th instance turns up — four is suggestive, not yet a strong enough pattern to warrant its own page per the fold-vs-split compression check.