Letter 48 — On Quibbling as Unworthy of the Philosopher (§5)

“It is clear that unless I can devise some very tricky premisses and by false deductions tack on to them a fallacy which springs from the truth, I shall not be able to distinguish between what is desirable and what is to be avoided! I am ashamed! Old men as we are, dealing with a problem so serious, we make play of it!”