Princeton WordNet 3.0 licence
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This is the licence for Princeton WordNet 3.0, the source of the dictionary senses
shown by Ziko's solver Hint (issue #1459, ADR 0005). It is reproduced VERBATIM from
the preamble that heads every WordNet 3.0 database file (dict/index.noun and its
siblings), which is where Princeton publishes it with the data.

Three obligations follow from it, and all three are met:

  1. The copyright notice and the disclaimer must appear on ALL copies of the
     software, database and documentation, INCLUDING MODIFICATIONS. Our lexicon is a
     modification (a filtered, reordered subset), so the notice travels with it: this
     file is committed to the repository, and the generated module
     supabase/functions/_shared/hint-lexicon-data.generated.ts carries the copyright
     line in its header.

  2. Attribution ships in the app. Settings › About credits WordNet, carrying the
     copyright line and the disclaimer, and links to https://ziko.games/wordnet —
     THIS page, which is the permission notice itself. A link to princeton.edu would
     be a citation of the licence; term 1 asks for a copy of it, so the app points at
     our verbatim copy and this page credits Princeton in turn
     (components/DataAttribution.tsx, WORDNET_NOTICE; constants/legal.ts,
     WORDNET_LICENSE_URL).

  3. Princeton's name may NOT be used in advertising or publicity about the
     distribution. Nothing in the App Store listing, the marketing site, or any social
     copy may name Princeton or WordNet as an endorsement or a selling point. The
     in-app credit above is attribution, not advertising, and is required by term 1.

Commercial use is explicitly permitted, without fee or royalty, and there is no
copyleft or ShareAlike term. ADR 0005 records why that absence was decisive: every
alternative dictionary is CC BY-SA, and adding a second copyleft corpus to the same
clue-and-hint pipeline would compound ADR 0004's still-open ShareAlike exposure.

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