I've used that phrase many times at work myself. But that fails to give it proper context. For over 12 years now, I've told new hires, students, and others, something along the lines of: "You may have heard that there is no such thing as a stupid question. I don't subscribe to that view. There are stupid questions. Those are the questions that are asked without effort or understanding." This has generally been part of my "don't be afraid to ask questions" speech for new team members. I want to encourage them to ask questions, but mostly as a way to become unstuck in their efforts. If I'm answering all the questions for my subteam, I'll never get any other work done. I want them to find that fine line between pestering me and getting work done (it doesn't do me any good for them to spend 2 hours deciphering something I can answer in 2 minutes, so long as they aren't asking me something every 10 minutes).