Students often ask why critical thinking is required at university and what it means to be a critical thinker.
Critical thinking has been variously defined but the following two definitions may help you to understand it better.
Critical thinking is a process, the goal of which is to make reasonable decisions about what to believe and what to do (p.xvii).
Ennis, R. H 1996, Critical thinking, Prentice-Hall, NJ.
Critical thinking is evaluating whether we should be convinced that some claim is true or some argument is good, as well as formulating good arguments. p. 5