Two new problems of bivalent propositional logic are proposed here: firstly, to distinguish the sense of propositions, besides the logical value and secondly, to analyze the ”ponderal” difference between two parts of a proposition: subject-predicate. 1 Relational projections and extensions Let r = (A1, A2, A3, R) be a ternary relation (see [3]). Starting with this, we may define three binary re...
