ONT Re: De In Esse Predication
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DEIP. Note 10
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| Indexical Dicisigns seem to have no important varieties; but propositions are
| divisible, generally by dichotomy primarily in various ways. In the first place,
| according to 'Modality' or 'Mode', a proposition is either 'de inesse' (the phrase
| used in the 'Summulae'*) or 'modal'. A proposition 'de inesse' contemplates only
| the existing state of things -- existing, that is, in the logical universe of
| discourse. A modal proposition takes account of a whole range of possibility.
| According as it asserts something to be true or false throughout the whole
| range of possibility, it is 'necessary' or 'impossible'. According as it
| asserts something to be true or false within the range of possibility
| (not expressly including or excluding) the existent state of things),
| it is 'possible' or 'contingent'. (The terms are all from Boethius).
|
|* Petrus Hispanus, 'Summulae Logicales', p. 71B.
|
| C.S. Peirce, CP 2.323, unpublished "Syllabus", circa 1902.
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