The brain in the vat and the burden of proof

Any reason to think it isn't true? One way around this is to shove the burden of proof to the other side. In fact, you can win any debate just by shoving the burden of proof to the other side, because you can ask for proof for the proof, and then proof for the proof for the proof, and then proof for the proof for the proof for the proof, and then proof for the proof for the proof for the proof for the proof......., until your opponent gets tired.