Negation in research refers to the act of negating or denying a proposition or statement. It is a fundamental concept in logic and linguistics, and plays a crucial role in reasoning, argumentation, and communication. Research in the area of negation explores how negation is expressed in different languages, how it affects the interpretation of information, and how it can be used to clarify or strengthen arguments. Studies in this field also examine the cognitive processes involved in understanding and processing negation, and the implications of negation for artificial intelligence and natural language processing.