I've never had the opportunity to confront ageism directly in an interview, but if I did, I would ask the (young interviewer) if they thought they would be (a)

I've never had the opportunity to confront ageism directly in an interview, but if I did, I would ask the (young interviewer) if they thought they would be (a) more, or (b) less skilled when they had 10 more years of experience.