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thought for the arena of a perfect logic, we should be performing, perhaps, a remarkable dialectical feat; but this feat would be a mere addition to the complexities of nature, and no simplification. This motley world, besides its other antics, would then contain logicians and their sports. If by chance, on turning to the flowing facts, we found by analysis that they obeyed that ideal logic, we should again be beginning with things as we find them in the gross, and not with first principles.

It may be observed in passing that no logic to which empire over nature or over human discourse has ever been ascribed has been a cogent logic; it has been, in proportion to its exemplification in existence, a mere description, psychological or historical, of an actual procedure; whereas pure logic, when at last, quite recently, it was clearly conceived, turned out instantly to have no necessary application to anything, and to be merely a parabolic excursion into the realm of essence.

In the tangle of human beliefs, as conventionally expressed in talk and in literature, it is easy to distinguish a compulsory factor called facts or things from a more optional and argumentative factor called suggestion or interpretation; not that what we call facts are at all indubitable, or composed of immediate data, but that in the direction of fact we come much sooner to a stand, and feel that we are safe from criticism. To reduce conventional beliefs to the facts they rest on — however questionable those facts themselves may be in other ways — is to clear our intellectual conscience of voluntary or avoidable delusion. If what we call a fact still deceives us, we feel we are not to blame; we should not call it a fact, did we see any way of eluding the recognition of it. To reduce conventional belief to the recognition of matters of fact is empirical criticism of knowledge.