|Geach, Peter T.
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Distribution: an expression can not occur in the conclusion, which has not occurred in the premises -
apropos I 54
Distribution / Salmon (external) : each categorical expression of a term of a syllogism must be distributed (refer to each individual in the domain) - e.g. All whales are mammals does not say anything about any whale but about any mammal
Distribution / distributed "any" instead of "all" (cumulative)
Logic Matters Oxford 1972