I think in the Pro Flacco citation under sense 6 in the OLD it does mean 'bias' (conscious rather than unconscious bias). Cicero is talking about how witnesses used to be impartial and not in the pay of prosecutors, so they used to speak 'sine ullo studio'.

It is indeed a 2 in this 1680 edn: www.google.co.uk/books/editio...

Could it be a 2? 1=Initium, 2=Verbum, 3=Ignis.

'a h[e]art denied knowes no power nor can submit' would be my best guess!

Extend that end-point by 1500 years or so and we have a Latin corpus 10,000 times bigger than that (acc. to Leonhardt, though I'd guess it's at least an order of magnitude more). So plenty for Latinists to be getting on with!

I don't, but the image is based on the one that illustrates the first chapter of the Ship of Fools

That usage is as early as Augustine: L&S gives under 'canonicus' sense  IV. Eccl. Lat., of or belonging to the canon, canonical: libri, Aug. Civ. Dei, 18, 36; id. Doctr. Christ. 2, 8.

"A proprement parler, il n'existe jamais de texte original: tout mythe est par nature une traduction" -Lévi-Strauss, L'homme nu.