Let the silly idea live for five minutes before you judge it. Some of them grow up to be serious.

Most ideas arrive looking ridiculous because they have not been dressed yet. Judgement is faster than imagination, so the good version never gets built. You kill the thing at minute one and never find out what it becomes at minute six. Silly and wrong are not the same, and you cannot tell them apart while the idea is still one sentence.

Next time something dumb pops into your head, give it five minutes on paper before you decide. Sketch it, say it out loud, follow it a little way. Five minutes is the whole risk.