Two Squares of Opposition: for Analytic and Synthetic Propositions
Andrew Schumann · arXiv (Cornell University) · 2011
In the paper I prove that there are two squares of opposition. The unconventional one is built up for synthetic propositions. There a, i are contrary, a, o (resp. e, i) are contradictory, e, o are subcontrary, a, e (resp. i, o) are said to stand in the subalternation.