Principle Of Belief Conservation

For any proposition, P: If

  1. Taking a certain cognitive stance toward P (for example, believing it, rejecting it, or withholding judgement) would require rejecting or doubting a vast number of your current beliefs,
  2. You have no independent positive reason to reject or doubt all those other beliefs, and
  3. You have no compelling reason to take up that cognitive stance toward P,

then it is more rational for you not to take that cognitive stance toward P.

Tom Morris, PhD, Philosophy For Dummies