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Principia mathematica, vol. 1 (of 3)

*37. PLURAL DESCRIPTIVE FUNCTIONS.

Project Gutenberg EPUB3 edition Whitehead, Alfred North and Russell, Bertrand
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The above proposition (*37·2) is one of the forms of asyllogistic inference due to Leibniz's teacher Jungius. The instance given by Jungius is: "Circulus est figura; ergo qui circulum describit, is figuram describit[56]." Here the class of circles is our , the class of figures is our , and the relation of describing is our .

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Principia mathematica, vol. 1 (of 3), Project Gutenberg eBook #78050

*36. RELATIONS WITH LIMITED FIELDS. FOOTNOTES: