@misc{Lexicon of Arguments,
title = {Quotation from: Lexicon of Arguments – Concepts - Ed. Martin Schulz, 29 Mar 2024},
author = {Geach,Peter},
subject = {Element Relation},
note = {I 53
Two-class theory/GeachVs: this theory is even worse than the Two-names theory.
>Two-names theory.
Two-class theory: E.g. the general term "philosopher" denotes "class of philosophers". - Socrates is then only a member of the class.
>General term, >Denotation.
GeachVs: the element relation is very different from the subclasses relation: E.g. A parliamentary committee is not a member of Parliament.
>Element relation, >Subsets.
But: "a philosopher" means the same in both applications.
Copula: fallacy of division: as if two varieties existed: one for "is a philosopher" and one for "is an element of the class of philosophers".
>Copula/Geach.
Geach: equivalent sets must not be divided into equivalent subsets - "every logician" is not equivalent to "class of logicians".
>Equivalent class.},
note = { Gea I P.T. Geach Logic Matters Oxford 1972
},
file = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=215592}
url = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=215592}
}