Critical Thinking is the opposite of blind engagement in group think. It is applied Intellectual Honesty. The functioning of brain cells, muscle cells, blood cells, -all cells- are governed by the laws of nature, -not- your chosen belief system. The laws of nature that control human cellular function are -not- governed by your chosen belief system or the dogma you have been indoctrinated into, or the dogma you refuse to set aside.

Data-less conclusions founded upon faulty assumptions are the mother of all screw-ups. They lead to human belief systems that quickly get set in stone insuring that new information gets shouted down as group think, ego, and resistance to change supplant data, logic and reason.
Put data ahead of dogma. Follow the data -not- the crowd.
“In God we trust…Everyone else must bring data.”
[W.Edwards Deming]
“Nature, to be commanded, must be obeyed.”
[Francis Bacon]
As you continue to acquire and apply more information you continue to expand the area of what is possible.