Philosophy Lexicon of Arguments

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Geach, Peter T.
 
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Imperatives I 275f
Command/Moral/Logic/Geach: a statement-line cannot be in an if-clause. - "If you want ..." these are real imperatives, only grammatically a hypothetical sentence. - The wish itself has nothing to do with the truth conditions. - But an utterance does not get empty qua imperative, simply because it cannot be fulfilled.
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I 282
Imperative/Logic/Geach: difficult problems: "Tu x or tu y!" Cannot be interpreted as "I command x or I command y" - analog to assertions: l- p v q cannot be interpreted as l-p or l-q.
Solution/Hare/Geach: distinction neustic/tropic/Hare (> Hare, R.M.) - E.g. tropic: is identical in "Tu x or tu y" and "You will do x or you will do y". - Phrasticon: "Your future doing of either x or y" - Neusticon: "Please!" or yes". (assertorically).
Disjunction/Geeach: it belongs to the tropic. - Neustic: is added to the tropic as a whole, not to one or the other disjoint.
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Zoglauer I 23
Definition Tropic/Hare: descriptive component of a standard sentence-
Definition Neustic/Hare: prescriptive component of a standard sentence.

Gea I
P.T. Geach
Logic Matters Oxford 1972

Zo I
Th. Zoglauer
Einführung in die formale Logik für Philosophen Göttingen 2002


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Ed. Martin Schulz, access date 2017-03-23