This is just what all development depends upon, this attainment of novelty, which is consistent with older knowledge and supplementary to it.

But suppose a man have thoughts which are not true, which do not fit the topic of their application, which contradict established knowledges, or which result in bizarre and fanciful combinations of them; to that man we deny the name genius; he is a crank, an agitator, an anarchist, or what not.

The test, then, which we bring to bear upon the intellectual variations which men show is that of truth, practical workability--in short, to sum it up, "fitness." Any thought, to live and germinate, must be a fit thought.

And the community's sense of the fitness of the thought is their rule of judgment.
Now, the way the community got this sense--that is the great result we have reached above.

Their sense of fitness is just what I called above their judgment.