Know what Fundamentalists mean by particular terms. You can waste much time by discussing two different things while using the same terminology. This is called theological or confessional faith. But for Fundamentalists, faith is trust in Christ's promises. This is fiducial faith.
Tradition is another confusing term, as are inspiration and heaven.
If you don't define terms clearly, Fundamentalists will misunderstand your argument. And don't presume a question means what it seems to mean. Find out what your opponents are trying to say. If the question refers to the Virgin Birth, make sure they don't mean the birth of the Virgin. Don' t agree to it.