Cognitive logic studies the reasoning laws of concepts such as knowledge and beliefs, while social cognitive logic explores the logical nature of social relationships, particularly the impact of social relationships on people's cognitive reasoning. Over the past decade, social relationships and social influence as a new research topic has garnered attention from logicians and interacted interestingly with cognitive logic, leading to many new discoveries and forming the field of social cognitive logic. A central question addressed in this book is: by introducing the new perspective of social relationships into cognitive logic, what are the new changes and rules in the cognitive reasoning of individuals? The book introduces the concepts of reflective rationality and evolutionary rationality, providing research results based on these two different paths.