Granted that the “argument from doubt” has no merit, I think that nevertheless it is one of those cases of “finding bad reasons for what we believe on instinct” which serves as a clue to the instincts which actually do the convincing. The hunch in question here was, I think, that the indubitably known mathematical truths (once their proofs had been worked through so as to make them clearly and distinctly perceived with a sort of “phenomenal” vividness and non-discursiveness) and the indubitable momentary states of consciousness had something in common—something permitting them to be packaged
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