Deludable

For well understanding the omniscience of his nature, he is not so ready to deceive himself, as to falsifie unto him whose cognition is no way deludable.

[That] is too absurd to be mentioned by the most malignant calumniator, or to be credited by the most deludable dupe.

One could simply stop the argument there, dismiss the resurrection as a lie, and declare belief in the risen Jesus to be the product of a deludable mind.