A fact must be assimilated with or discriminated fromm some other fact or facts in order to be raised to the dignity of a truth and made to convey the least knowledge to the mind.
The monopoly of science in the realm of knowledge explains why evolutionary biologists do not find it meaningful to address the question whether the Darwinian theory is true.
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The deductive method is the mode of using knowledge and the inductive method the mode of acquiring it.