[cbhl]

Concepts can have more than one name. An important part of preparing a training or presentation is understanding your audience, and using names that resonate with them.

If this had been a freshman college crypto class, the word "oracle" (https://security.stackexchange.com/questions/10617/what-is-a...) may have been used instead, to indicate that the exact details of hash reversing can be abstracted away and that the key detail is that it's much faster than brute force would suggest.