This, but present tense, is my favorite. “What happens when you try x?” If they haven’t tried it, they can say, “hmm, I don’t know. Let’s see.” If they have, th

This, but present tense, is my favorite. “What happens when you try x?” If they haven’t tried it, they can say, “hmm, I don’t know. Let’s see.” If they have, they can say, “it errors out” or “it sorta works but...” or whatever. In my experience it comes across as curiosity rather than judgement.