Since I started reading blogs, articles and forums about testing, I've noticed testers mocking developers when they use the phrase "It's not a defect, users would never do that" or something along those lines. In fact, I have been on the receiving end of that kind of comment recently when a developer told me "It's not a defect, it's a suggestion for improvement". Naturally, I disagreed! After I calmed down, I tried to think from the developer's point of view, and knowing he was very intelligent and good at his job, I started to realise, that maybe, ever so often, us testers aren't always right... (but on this occasion, I was!).