One tactic I use to avoid avoid argument is to make conditional claims that are correct as a matter of structure without committing myself to any particular premises.

I also use the following strategy for avoiding a certain kind of wrong statement (which seems to help me concede arguments): I try to avoid making statements about the way the world is; instead I make statements about my thoughts and beliefs about the way the world is. If something changes my mind, my previous statements remain correct as descriptions of what I thought at the time. The effect is that when I surrender to the truth, I say things like,"That prior belief of mine was wrong, and you've convinced me to discard it," but not things like, "That previous statement of mine was wrong."