Rational Reasons, Counterfactual Statements and “Impossible Worlds” in the Philosophical Justifications of Thought Experiments

In his theory of natural laws David Lewis rejects the authenticity impossible worlds on grounds that contradiction contained within modifier "in (the world) w" is tantamount to a in whole theory, which seems unacceptable. At same time, philosophical discourse very often researchers use counterfactual situations and thought experiments with events objects. There need apply genuine, concrete, but worlds. One way do this reject Lewis's classical negation it leads problems completeness inconsistency inside The proposed extension for impossibility compatible extensional metaphysics, although some loss description semantics.