Re: Aren\'t math and logic just ways of perception?
The reason why some mathematicians, logicians and others say that numbers, sets and similar things exist objectively is because of their ontological commitment to them. If they say, "There is a number, 6, such that..." then on the surface that implies that 6 exists. Either you tell a story about why the literal meaning of the sentence is false but still useful, or you leave it at that.
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