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[timelets]

Logic is, therefore, without practical utility; but it must nevertheless be retained, because it has philosophical interest as the special knowledge of the organisation and action of reason.

But it has its real value, in relation to philosophy as a whole, in the inquiry into the nature of knowledge, and indeed of rational and abstract knowledge. Therefore the exposition of logic should not have so much the form of a practical science, should not contain merely naked arbitrary rules for the correct formation of the judgment, the syllogism, &c., but should rather be directed to the knowledge of the nature of reason and the concept, and to the detailed investigation of the principle of sufficient reason of knowing.

-- Arthur Schopenhauer, The World As Will And Idea.
https://www.gutenberg.org/cache/epub/38427/pg38427-images.html

For centuries, if not millennia, logic was mostly useless until computer software came along and took advantage of it.