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Provenance
----------
The RRT exercise is derived from soamsy/Syllogimous-v3
(https://github.com/soamsy/Syllogimous-v3), itself descended from
Syllogimous by 4skinSkywalker and Syllogimous-v3 by ikokusovereignty,
all under CC BY-NC 3.0 — this license therefore applies to Cerevana as
a whole.

The N-Back exercise merges two lineages into one game. Its engine is
derived from soamsy/quad-box (https://github.com/soamsy/quad-box),
MIT-licensed, and has since diverged as Cerevana code; the derived files
in js/quadbox/engine/ keep per-file MIT attribution headers, the license
is kept at js/quadbox/LICENSE, and the full derivation is documented in
js/quadbox/PROVENANCE.md (the quad-box-derived portions are not subject
to this repository's CC BY-NC terms). Its classic mode families are an
original JavaScript reimplementation of the n-back protocol popularized
by Brain Workshop (Paul Hoskinson and Jonathan Toomim, GPL-2.0) —
Cerevana shares no code with Brain Workshop, which is credited as
protocol source and inspiration.

The CCT exercise's core mechanics (the adaptive-interval PASAT rule) are
derived from tim22dev22/CCT (https://github.com/tim22dev22/CCT),
MIT-licensed; the derived files in js/cct/engine/ keep per-file MIT
attribution headers, the license is kept at js/cct/LICENSE, and the full
derivation is documented in js/cct/PROVENANCE.md (the CCT-derived
portions, including the vendored voice-pack audio, are not subject to
this repository's CC BY-NC terms). Everything else in js/cct/ (settings,
game loop, history, profiles, page controller) is original Cerevana code.

Bundled third-party assets carry their own licenses: the Space Grotesk,
Zen Dots, Oxanium, JetBrains Mono and Format 1452 typefaces (all SIL OFL
1.1, see fonts/); the coolicons UI icon webfont (MIT, see
fonts/cool/LICENSE-coolicons.txt); the menu background photo by Kieren
Ridley (Pexels License, img/menu-bg.jpg); the Cerevana head logo used for
the favicon, app/PWA/iOS icons and social-preview image (Canva Content
License, separate from this repository's CC BY-NC terms); Chart.js with
date-fns and chartjs-adapter-date-fns (all MIT, vendored in js/lib/, see
js/lib/LICENSE-date-fns.txt); the d3 stimulus libraries d3-delaunay,
delaunator, robust-predicates, d3-shape and d3-path (ISC, see
js/lib/LICENSE-d3-stimuli.txt); and the CCT voice-pack audio (MIT,
vendored in js/cct/audio/, see js/cct/LICENSE).