In ruby, is truthiness idiomatic for a method name ending with a question mark?

Question

Is it normal for methods with a question mark to return something that\'s truthy (for example, a number) to indicate that something is true, or should true itself b

Answer 1

I renamed the method in question to remove the ?, which was really not important to the question being answered. Scanning through the core functions that end in ?s, the only ones I spotted that returned data or nil were the add? and delete? methods on Set.