@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} }