Brandon Williams - Seemingly Impossible Swift Programs 

`Int` could definitely conform to `CaseIterable` using lazy collections, and you could then implement `anySatisfy` for it. Whether you could *run* it in a reasonable amount of time is another matter.

Nice talk by Brandon as usual! Just a little technical issue: left audio channel is totally dead :)

Well.. one could define the same method for String, where it would find a string having particular properties by recursively building that string. It would die with stack overflow pretty soon, but would definitely work the same way. I'm trying to say, the bitfield infinity and String infinity are pretty much similar, with the former being constructed from a much smaller vocabulary. Actually, big integers can be treated similarly.

Seems like it’d be faster to implement `allSatisfy` in terms of `anySatisfy` than the other way around. Eh, maybe not... depends on whether the predicate is more likely to return false or true.