Journal of Philosophical Logic, Vol. 44, No. 3 (June 2015), pp. 237-258 (22 pages) Harold Hodes in [1] introduces an extension of first-order modal logic featuring a backtracking operator, and ...

Journal of Philosophical Logic, Vol. 42, No. 2 (April 2013), pp. 317-334 (18 pages) For deductive reasoning to be justified, it must be guaranteed to preserve truth from premises to conclusion; and ...

THIS book is intended for the use of students at the various Indian colleges, and will be regarded by most teachers of the subject as, upon the whole, a very good text-book. The author has read many ...

Editor's Note: This article was provided by The Conversation. The original can be found here. Calling something a “scientific truth” is a double-edged sword. On the one hand it carries a kind of ...