I think the question is a little vague here so first I would clarify it. Below are the first 2 questions I would ask.
1) In what topic(s) does the person know less than me?
Maybe in one topic (lets assume the core of our business) they know less than me, however they have so much experience on coding (lets assume which is not central to your business but is still important), she/he might help you in that area. It is pretty hard for someone to know less than you in all topics of business/life.
By asking this question first, i think you would be showing the interviewer that you are humble and you realize that you cant know about everything better than everybody else.
2) If they know less than me (which is meant to sound unappealing) why do I have to work for them?
Now this is something that every young business person gets to know at some point in their lives. Not all bosses are smart. They just have money, which is pretty important if you want to get things done and invest in your business for further growth.
So, in fact, if you found someone that has a lot of money, knows less than you about a specific topic, but believes in you and is willing to put her/his money on the table for you. Wouldn't you really want to work for that person? I would!
The point I am trying to make by these 2 questions is, by asking these types of questions, you show the interviewer that you are open minded, and you see other alternatives and potential scenarios in any given scenario no matter how good or bad it may look.
Hope this helps