I hate to be very blunt, but "there's not such thing as a dumb question" is complete and utter crap. People ask dumb questions all the time but no one will acknowledge it and call them out. Why is that? Are we afraid of confrontation?
Just today at work, I work in a restaurant, I had a customer call me and ask a simple question– "What's the largest size pizza you have?" So I responded with "A large." The customer then proceeded to say "So you don't have extra larges?" I couldn't help but get really annoyed. Part of me wanted to say "You know what as a matter of fact I'm a liar and we actually have extra larges," but I just replied with "No we just have larges, sir." Stuff like this happens all the time though and I've reached my breaking point.
As a species we are extremely evolved in comparison to the other beings who inhabit our planet. Why can we not understand simple concepts? If you ask a specific question and receive a specific answer, why would you question it? I gave you an answer that's specific to your question and entirely true. Why do people not understand this?
There is certain times in which I understand answers not being clear to questions, which you can then question more. But for the love of god people, if someone gives you a very straight answer to a very straightforward question, what is confusing? Why do you feel the need to question what answer was given to you, let alone by someone who was extremely qualified to answer your question.
We are a society of extremely educated people. We are all aware that people can lie, that's always a possibility, but we are usually very open about things. Dumb questions are a thing, I'm sure most of us have experienced them. I don't think it's much to ask of people to not ask dumb questions anymore. There are certain situations that are very transparent, in which case questions don't need to be asked. There are also some questions that i understand need to be asked, but when you receive an answer, don't question it.
Dumb questions are extremely annoying and can ruin someone's day. They can be so utterly ridiculous that it can ruin someone's whole day or week. If you receive an answer, stick with it. That person is not lying to you. We are all on this Earth to help other people and explain things others don't understand, so please, DO NOT QUESTION PEOPLE WHEN YOU GET A STRAIGHTFORWARD ANSWER. People are for the most part honest with you, and you should realize that. Stop being crappy people for once.