Dawn Treader calls this the “Columbo method” of apologetics after the TV detective. Ben Franklin got it from Socrates, but he didn’t use the method for Christian apologetics but rather to gain his point in religious and political debates:

“I was charm’d with it, adopted it, dropt my abrupt Contradiction, and positive Argumentation, and put on the humble Enquirer & Doubter. And being then, from reading Shaftsbury & Collins, become a real Doubter in many Points of our Religious Doctrine, I found this Method safest for my self & very embarrassing to those against whom I used it, therefore I took a Delight in it, practis’d it continually & grew very artful & expert in drawing People even of superior Knowledge into Concessions the Consequences of which they did not foresee, entangling them in Difficulties out of which they could not extricate themselves, and so obtaining Victories that neither my self nor my Cause always deserved. I continu’d this Method some few Years, but gradually lef it, retaining only the Habit of expressing my self in Terms of modest Diffidence . . .”

This “humble questioner” approach can be helpful in putting people off their guard, but it does cut both ways. Answer carefully the questions unbelievers ask you. (I’ve been reading Benjamin Franklin’s Autobiography for our American Literature class.)