What is the definition of critical thinking?

Critical thinking is a way of identifying all arguments related to the problem and finding ways to solve it systematically. It is not necessarily that a person who has a good memory is also a good critical thinker as this skill needs to be developed over time and be practiced.

As some do not need to get much information on a certain idea or problem as long as the person how to make use of all those information to come up with a solution. This should also not be confused with being argumentative as this is often related in exposing inconsistencies and fallacies of a person but to improve social interactions.