Doesn't even have to be an intentional lie. Sometimes there are just multiple "things" a function could be known as and only one can be chosen for the function name. I recently wrote a function crc() that goes and computes the thing. The comments above it talk about what CRC it is (non-obvious without domain knowledge of CRCs and the different forms polynomials can be written in) and why it was chosen. This commonly done with cryptography as well. AES functions are commonly named rijndael with a comment about the standard or vice versa.