Explicit Constructive Logic ECL: a New Representation of Construction and Selection of Logical Information by an Epistemic Agent

One of the main goals of Explicit Constructive Logic(ECL) is to provide a constructive formulation of Full (Classical) Higher Order Logic LK! that can be seen as a foundation for knowl- edge representation. ECL is introduced as a subsystem Z! of LK!. The first order case Z1 and the propositional case Z0 of ECL are examined as well. A comparison of constructivism from the point of view of ECL and of the corresponding features of Intuitionistic Logic, and Constructive Paraconsistent Logic is proposed.