Chapter 1 TYPE - THEORETICAL DYNAMICS

In the light of the epistemic approaches to logic as agent-based procedures of knowledge, a basic dynamics for type theory is introduced. The formalization provides epistemic explanations for the basic notions of belief state and belief set, by referring to assertion conditions for typetheoretical judgements; it interprets expectations in terms of default assumptions for such a structure; it adapts the usual revision operations and the analogous of the Ramsey test. The model, restricted to operations of revision, merging and information preference, furnishes interesting hints on a constructive type-theoretical approach to dynamics.