Presuppositionalists assert that many of the classical arguments are logically fallacious, or do not prove enough, when used as arguments to prove the existence or character of God. They criticize both the assumption of neutrality and the "block house" or "piecemeal" method for failing to start at the level of the controlling beliefs of worldviews and implicitly allowing non-Christian assumptions from the start, thereby trying to build a Christian "house" on a non-Christian "foundation". Evidentialists demur from this assessment, claiming that presuppositionalism amounts to fideism because it rejects the idea of shared points of reference between the Christian and non-Christian from which they may reason in common.