This sort of issue arrises often with respect to overloading of functions in languages like C++. In general the name of the function should say it all so that when you are reading the code you don't have to go looking elsewhere to discover subtle, but important, details about the parameters and return results.
However this can lead to "identifiers that tell a story" which is even worse - hard to type and hard to read. There is a real art to creating good identifiers!
The other aspect of this is a tension between a rich interface and a lean interface. A rich interface gets harder to use and to maintain. A lean interface tends toward ambiguity and missing functionality. This tension also plays part in the art of programming.
DWIM is Perl's answer to Gödel
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