@misc{Lexicon of Arguments, title = {Quotation from: Lexicon of Arguments – Concepts - Ed. Martin Schulz, 29 Mar 2024}, author = {Prior,Arthur N.}, subject = {Sets}, note = {I 61 Class/set/Prior: the statement that something is a member of a class is only seemingly a sentence about classes. >Element relation. In reality it is nothing more and nothing less than to say that "x φ-s". The appearance of the existence of "x" and of the existence of classes disappears. >Existence, >Ontology, >Classes. Clases are only logical construtions - only then the identity of unicorns and Pegasi is harmless (via the empty set). Logical constructions are no entities: all classes are logical constructions. >Logic, Cf. >Constructivism.}, note = { Pri I A. Prior Objects of thought Oxford 1971 Pri II Arthur N. Prior Papers on Time and Tense 2nd Edition Oxford 2003 }, file = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=246707} url = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=246707} }