It’s nice when people ask questions; whether they are atheists or mature Christians. We all like the feeling of being asked, or the opportunity to “give an answer for the hope we have”.
But, before you answer, just ponder whether they are asking to understand or just asking to make a point.
It could be as simple as saying, “Yeah, that’s something I’ve put some thought into. If I tell you what I think, is there really much chance it will change your mind?”
This is particularly true when chatting to non-Christians. They may have many presenting questions… But they aren’t real questions; they’re just gap fillers, questions to ask to appear didactic. If you said to them, “if I answer that question adequately, will it really make a difference to you?” And if they say “no” (as many I’ve spoken to have), then all of a sudden the conversation had shifted from abstract hypothetical barriers to the gospel, to real personal barriers to the gospel. You can ask, “ok, then what is your real question? What would it take for you to really consider Jesus’ claims?”
Satan loves it when we keep the conversation abstract and impersonal, so don’t go there unless its really the issue they’re dealing with.