In dialogue with unbelievers who ask good, difficult questions, it is often wise to ask questions of your own. Jesus often did this. We see it in Mark 11:27-33 and again in Luke 20:19-26. The apologist Greg Koukl calls this the “Columbo” tactic after the cop in the TV series who appeared to be a bumbling idiot but who used questions to get to the truth when trying to solve crimes. Greg has a short video here explaining how to use this tactic in apologetics. One book that I recommend on this subject is Greg’s book Tactics: A Game Plan for Discussing Your Christian Convictions.