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Distribution: an expression can not occur in the conclusion, which has not occurred in the premises -
ad 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)._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution.
Logic Matters Oxford 1972