@misc{Lexicon of Arguments, title = {Quotation from: Lexicon of Arguments – Concepts - Ed. Martin Schulz, 29 Mar 2024}, author = {Cresswell,Maxwell J.}, subject = {Truth Functions}, note = {Hughes I 24 Truth function/Hughes/Cresswell: only four different truth functions (tr.f.) of p: 1) Negation 2) p itself 3) true, no matter whether if p itself is true or false 4) wrong, no matter whether p itself is true or false. Hughes I 44 Truth-function/Hughes/Cresswell: each well formed formula (wff) of the propositional calculus is a truth function of its variables. - ((s) That is, it can be found in the truth table). Modal function: any well-formed formula (wff) containing a modal operator, is a modal function of its variables. >Truth tables, >Propositional calculus.}, note = { Cr I M. J. Cresswell Semantical Essays (Possible worlds and their rivals) Dordrecht Boston 1988 Cr II M. J. Cresswell Structured Meanings Cambridge Mass. 1984 Hughes I G.E. Hughes Maxwell J. Cresswell Einführung in die Modallogik Berlin New York 1978 }, file = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=282622} url = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=282622} }