I don't think it's a matter of proving anything. I think the issue is that no matter what the answers to these questions are, you have a good reason for intervi

I don't think it's a matter of proving anything. I think the issue is that no matter what the answers to these questions are, you have a good reason for interviewing the person. "What past success and experience do the founders have?" "Well, we've been involved in small projects individually like a b and c. But we've surrounded ourselves by great advisors like Mr. W who did x in 2001. And Mr. Y who was CTO at Z Corp." etc.