Critical Thinking

Merriam Webster
adjective. crit·i·cal \ˈkri-ti-kəl\ noun. thinking \ˈthiŋk\
Using or involving careful judgment about the good and bad parts of something. The action of using your mind to produce ideas, decisions, memories, etc.

Urban Dictionary
The ability to think on his or her own and see if the statement or theory make sense and test it independently before accepting as truth or universally applicable.