摘要: This paper begins by arguing that a truth conditional approach to the semantics for relevant logic is unnatural. Rather, we should adopt an informational semantics. On this view, indices in model theory are not possible or impossible worlds, but situations. A statement true false at situation; rather situation can be said either contain fail certain pieces of information. Valid inference, then, seen as information preservation, preservation. The distinction between and gives us some freedom our treatment logic. For example, may have very classical non-classical other hand, accept theories (such dialetheism) together with