In the past, I've dealt with that by saying something like "I would ask you X, but I saw from [place] that the answer is Y. Can you confirm that this is correct / confirm that this still true / tell me more?"
I put my cards on the table to show that I've done my homework and establish what I know already, then elicit more information. If there's nothing more to be said, then fine, but at least an interviewer who cares what I ask will know what I'm curious about even if I already happen to have an answer. And if I'm wrong, then it gives them an opportunity to correct the record. Or it gives them an opening to provide additional nuance.
I put my cards on the table to show that I've done my homework and establish what I know already, then elicit more information. If there's nothing more to be said, then fine, but at least an interviewer who cares what I ask will know what I'm curious about even if I already happen to have an answer. And if I'm wrong, then it gives them an opportunity to correct the record. Or it gives them an opening to provide additional nuance.