No one would ever write the latter, because (\p -> isValid p) is equivalent to isValid. However you're right that the function names would probably be a little

No one would ever write the latter, because (\p -> isValid p) is equivalent to isValid. However you're right that the function names would probably be a little longer in practice, and I've edited my example to reflect that. (But they're not convenience functions, they just have longer names due to Haskell's more limited namespacing)