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genuine inguiry is impossible where there is no genuine doubt.
But in my reasonings about logic I do not criticize my inferences by comparing them with any standard of which I have the least shade of doubt.

If somebody sats, Well! Then your esults are altogether uncertain!
I reply I so not pretend they are more certain than the multiplication table,
In the sense in which it is not certain that twice two is four my logic is uncertain.
I reach results of which I have no doubt whatever, after many years of strenuous effort to find some way of doubting them.
Further than that no man can go.
If any one of you says, "Well I have no doubt whatever thatmy standards of reasoning are perfectly correct all of them," I have only to say that a person in that frame of mind