 by evidence. You know, what would count as evidence for you? Someone says they don't believe in God. You might say, interesting, what do you mean by God? You know, what precisely is it you don't believe in? And the what question just, again, as I say, picks up on a word or a term your friend is using and gets them to unpack it a bit. Because in this soundbite age we live in, people often fling things out without much depth behind them. And so rather than getting hostile, you're just pressing back gently.