40

Logic 40

state of things in which that would be false which the denial asserts to be false.
Those who believe in the criterion innocently think that in order to ascertain whether the denial is thus inconceivable all they have to do is to try an easy experiment and so find out at once whether they can imagine the state of things in question or not.
But as T.S. still puts it, "the history of science teems with inconcievabilities which have been conquered".
What is required therefore is that 'inconcievable' should mean only unrealizable in imagination today but unrealizable after indefinite thinking and education.
It certainly must be admitted by every resonable disputant that every proposition whose denial is in that sense absolutely and eternally inconceivable is false.
This I will prove upon the spot.
I say then that a resonable disputant disputes because he