Correction: (max 500 charact.)
The complaint will not be published.
I 221
Copula/Geach: if you understand concept and object correctly, you do not need the copula.
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Concept/Geach , >
Concept/Frege , >
Object , >
Object/Frege .
Instead, you can use "falls under". - (In ancient times it was also handled like this).
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Ancient philosophy .
"is": ((s) "is a" suggests false identity (at most partial identity, i.e. classification).
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"Is" , >
Identity , >
Identification , >
Classification .
Frege late: VsFrege early: nor "falls under".
"is a"/Frege: does not mean "belongs to a class"!
"Is a..."/Geach: is no logical relation between an x and an object (class) called "human."
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Prediation/Geach , >
Predication , >
Attribution .
Complex Expression/Geach: "A person is wise" is a complex expression that needs to be split (analyzed): into "person" and ".... is wise".
Accordingly, Frege's remark "the concept of man" (which is not supposed to be a concept) is to be divided:
E.g., "The concept of man is realized" does not assert of a particular object that it is realized.
To say that a certain object, e.g. Caesar, is realized does not lead to falsity (as Frege believed) but is nonsense. (GeachVsFrege).
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Senseless , >
Truth value gap .
The sentence splits into "Man" and "The concept ... is realized".
The latter is a paraphrase of "something is a...".
Sentences that cannot be analyzed in this innocent way must be considered meaningless.
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Sentences/Geach , cf. >
Saturated/unsaturated/Frege .
E.g., "The concept of man is timeless".