why does `all { }` return `true` on an empty colle...

# functional

[Dalinar]

why does all { } return true on an empty collection, no matter what is in the predicate? Java's allMatch { } exhibits the same behaviour... it seems counter-intuitive to me, can someone explain? e.g. all { false} and all { true } will both yield true note: originally I typed anyMatch, it was a typo - I meant allMatch