Jevons
It was the aim of William Stanley Jevons (1835–1882), himself a pupil of De Morgan, to render Boole's calculus more simple and "logical" by removing those of its features that he found "mysterious" and by reducing its operations to mechanical routine. He also professed, officially, to reject the extensional standpoint in favor of a "pure logic" of terms, or "qualities," though the result in practice was still effectively a class or propositional logic, conceived rather in the manner of De Morgan's "onymatic" system. These views are set forth in two pamphlets, Pure Logic (London and New York, 1864) and The.....
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