Modality   

Modality

Commens
Digital Companion to C. S. Peirce
Modality
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1901-1902 [c.] | Definitions for Baldwin's Dictionary [R] | MS [R] 1147

The qualification of a predication on the one hand, or of a being on the other, in respect to possibility and necessity. Although assertoriness, with it metaphysical correspondent, actuality, is the absence of modality, yet it has to be considered from the point of view of modality.

1901-1902 [c.] | Definitions for Baldwin's Dictionary [R] | MS [R] 1147

Modality. [Ger. Modalität]. The qualification of a predication by one of the received modes possible, necessary, etc.; and the qualification of a fact by analogous metaphysical conceptions.

1902 | Modality | DPP 2:89; CP 2.382

There is no agreement among logicians as to what modality consists in; but it is the logical qualification of a proposition or its copula, or the corresponding qualification of a fact or its form, in the ways expressed by the modes possibile, impossibile, contingens, necessarium.