@julesh Is there an implicit F between the + and the 1 that's also participating in the pattern-match, or something like that?

@christianp I hadn't considered before how strange it was that there is North Yorkshire south of York.

In unrelated news, 4 of my tray icons either have images missing or display as black-on-black (5 while taking a screenshot).

@julesh The standard Android keyboard is actually pretty good for stuff like this. Simple arrows are available on the symbol layer under the `^` key. I still miss otimes quite a lot, though.

@jhaas @futurebird Surely the use of := for definitions in maths predates (and influences) APL, rather than the other way round.

@julesh You know you've played too many modern card games when, between playing vouchers, you say “into”.

Here's an article about the Othello perfect draw thing written by a strong player, about how players' preparation and gameplay concretely lead to that result: https://www.worldothello.org/news/445/the-catch-22-perfect-storm

Update: the knock-out rounds finished with no further draws. Congratulations to defending champion 栗田誠矢 Kurita Seiya!

@julesh (At least the claim is) that the game-theoretic value of the starting position is calculated (as 0, in this case). A strong solution would give a tractable way to evaluate any possible position.

It's weird, though, because we'd want substitutions to contain synthesising terms (because ultimately those terms replace variables, which are synthesising), but surely you would never synthesise a type of the form `A[σ]` (as required by the snoc rule, `(σ : Γ ⇒ Δ) → Γ ⊢ A[σ] → Γ ⇒ Δ, A`). Maybe […]

Or does that end up being circular?