%0 Journal Article %T Different Arguments, Same Problems. Modal Ambiguity and Tricky Substitutions %A Urbaniak %A Rafal %J - %D 2017 %R 10.31820/ejap.13.2.1 %X Sa£¿etak I illustrate with three classical examples the mistakes arising from using a modal operator admitting multiple interpretations in the same argument; the flaws arise especially easily if no attention is paid to the range of propositional variables. Premisses taken separately might seem convincing and a substitution for a propositional variable in a modal context might seem legitimate. But there is no single interpretation of the modal operators involved under which all the premisses are plausible and the substitution successful %K Church-Fitch paradox %K futura contingentia %K modal logic %K modal operators %K propositional quantification %K Swinburne¡¯s modal argument %U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=299300