Lexicon of Arguments

Philosophical and Scientific Issues in Dispute
 
[german]


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Table
Concepts
Versus
Sc. Camps
Theses I
Theses II

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I 63
Identity of classes: symbolic:

∏xEφxψx
Identity/Relation-in-Extension:

∏x∏yEφxyψxy.

Identity/thre-place predikates:

∏x∏y∏zEφxyzψxyz

So you can go on and on up - or down to zero-place predicates (propositions).

>Predicates, >Propositions, cf. >Predicates/Cresswell.
I 62ff
Identity/Prior: a "zero-place predicate": (0) Eφy i.e. "If φ then ψ and if ψ then φ" (spelling Lesniewski: E = equivalent) - which is the case when φ and ψ are the case, or not case when φ and ψ are not.
>Definition, >Definability, >Facts, >Truth value.
Truth value/Prior: so we imagine the term "truth value" for what we describe as the same, if the condition (0) is satisfied.

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