This engaging coursebook aims to teach critical thinking skills - the ability to interpret, analyse and evaluate ideas and arguments. Alec Fisher's approach is based on a widely shared conception of critical thinking and covers many of the basic skills and competencies displayed by good critical thinkers. This second edition has been extensively revised with updated examples and a brand new chapter on how to obtain reliable information from the internet. It is suitable for a wide range of students in schools, colleges and universities and may also be used for self-study.