Combining Texts

All the ideas for 'Categories, Classification, Cogn. Anthropology', 'The Human Body is a sort of Machine' and 'Gentzen's Analysis of First-Order Proofs'

expand these ideas     |    start again     |     specify just one area for these texts

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5 ideas

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

13831

Logic is based on transitions between sentences [Prawitz]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

13825

Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

13823

In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]

7. Existence / E. Categories / 2. Categorisation

10494

Several words may label a category; one word can name several categories; some categories lack words [Ellen]

26. Natural Theory / A. Speculations on Nature / 2. Natural Purpose / b. Limited purposes

19376

A machine is best defined by its final cause, which explains the roles of the parts [Leibniz]