Critical thinking are important characteristics that distinguish humans from other animals. In the modern era of information explosion and rampant misinformation, it is crucial to learn how to filter and analyze information. Philosophy is one of the rare academic disciplines that specifically studies " Critical thinking." Philosophers pay special attention to the quality and appropriateness of arguments. This course will introduce various argumentation techniques employed by philosophers. Once these argumentation techniques are learned, their application extends beyond the field of philosophy and becomes relevant to all academic disciplines as well as our daily lives. In this course, we will first introduce the basic tools of philosophers, such as what constitutes an argument and what qualities make a good argument. We will also explore arguments that intrinsically bad in their form. Once we have a certain level of understanding of these basic tools, we will delve into advanced argumentation tools, including various reasoning methods commonly used by philosophers. Furthermore, we will explain how to analyze and evaluate arguments, and how to examine the connections between premises and conclusions. Throughout the course, we will provide philosophical cases, daily examples, statistical cases, and other supporting materials to illustrate the course content.