I'm doing an ISTQB certification course. "Rex" and "Assume" posts are related to it too. Here's another nice one from it:
"... Sometimes it may be a good idea to formulate a bug report as a question. For example: 'Is it supposed to crash?' can be surprisingly effective. But don't be cynical, like 'So, it's supposed to crash, eh?' or 'So, we went swimming yesterday, eh?' - that's not nice."