Tag, You're It: That Pesky Burden of Proof

Who has the burden of proof? Those who proffer of an affirmative proposition, of course. It seems so straightforward. But is it? Maybe not. In fact, the burden is abundant, so there's plenty to go around. We need not be stingy with it.

When atheists insists that theists justify their belief in God, they are implicitly asserting the affirmative propositions that theists (like everyone else) ought to hold only justified beliefs and that since belief in God is unjustified, theists ought to abandon their belief. Those are affirmative assertions. Why should one hold only justified beliefs, and why is belief in God unjustified? I can't see why atheists have no burden of proof here.

If theists state their evidence (reason) for believing, the atheists may well say that the purported evidence is unconvincing. But why don't atheists bear a burden of proof here? They've put forth an affirmative position.

One tricky thing about the burden of proof is that many negative statements, which seem not to require proof, have affirmative counterparts. ("I have an alibi" equals "I did not commit the crime.") If atheists say the theists' justificatory statements are not convincing, the atheists are at the same time saying that the statements are unconvincing or unsound. That's an affirmative proposition for which the theists are entitled to demand evidence.

Or look at this way: when atheist demand evidence from theists, they are saying at least implicitly, "Doubt about the existence of God is justified." Under the atheists' rules of presumption, that affirmative proposition requires evidence, which the atheists provide implicitly: in effect, they say, "Good evidence for the existence of God is lacking." So even when such atheists insist they has no burden of proof, they in fact do have a burden of proof and they more or less try to discharge it.

As I've said before, the burden of proof is like a wet bar of soap, it easily slips from hand to hand. It's also like a game of tag. Much more often than atheists think, they make statements that enable their theist interlocutors to say, "Tag, you're it!"