Yes, there are such things as stupid questions. They appear many times throughout modern speech and literature, (most in the forms of typos, but none the less stupid questions.) These are examples of quite insolent questions.
Examples: How many days are in an hour? Are there continents on Earth? Are the letters s, t, u, p, i, & d, in the word stupid?
I hope that everyone now knows that rather 'obtuse' words do exist, and that humans are not afraid to ask them.
-Much love, Pikachusif