Secundum quid et simpliciter

This is a fallacy of unwarranted extrapolation from particulars to general, or viceversa. It means:

What is true in part (secundum quid), is also true unconditionally (et simpliciter).

In another version:

(1) "What is predicated with respect to something [secundum quid]"
(2) "What is predicated absolutely [simpliciter]"
therefore (2) is taken to follow necessarily from (1).

See:  'C. Dutilh Novaes and Read, "Insolubilia and the fallacy secundum quid et simpliciter”. Vivarium 46(2), pp. 175-191, 2008.


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