"The imaginary expression √(-a) and the negative expression -b, have this resemblance, that either of them occurring as the solution of a problem indicates some inconsistency or absurdity. As far as real meaning is concerned, both are imaginary, since 0 - a is as inconceivable as √(-a)."

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I think the fault is more with historicists who have stubbornly failed to develop a good theory of historicity. By simply resting on the feeble laurels of prima facie plausibility ('Jesus existed because everyone said so') and subjective notions of absurdity ('I can't believe Jesus didn't exist!'), the existence of Jesus has largely been taken for granted, even by competent historians who explicitly try to argue for it.

— Earl Doherty