Complex sentence: Grice's theory is often disputed by arguing that cooperative conversation, as with most social behavior, is culturally determined, and therefore the Gricean Maxims and the Cooperative Principle cannot be universally applied due to intercultural differences.
Split into simpler sentences: Grice's theory is often disputed with the argument that cooperative conversation, as with most social behavior, is culturally determined. Therefore, the Gricean Maxims and the Cooperative Principle cannot be universally applied due to intercultural differences.