We rarely give the “critical” part of “critical thinking” its due. Rigor in thought is hard, but so important.
The Socratic Method, an excellent application of iterative rigorous definition & refinement - https://www.youtube.com/watch?v=EB4MYGInRl4
A textual introduction to the Socratic method - http://www.philosopher.org/Socratic_Method.html
Carl Sagan delivers a compelling explanation of what happens when rigor isn’t properly applied - https://www.youtube.com/watch?v=w_N_IYi2c0E
An encyclopedia of logical fallacies (reading thru common missteps in thought can allow you to recognize them more easily while evaluating statements) - http://www.logicalfallacies.info/
A list of online tools for skeptical fact-checking - http://www.csicop.org/specialarticles/show/online_tools_for_skeptical_fact_checking
Last week’s THUNK episode on logic - https://www.youtube.com/watch?v=_P5AkmnMf4E
THUNK episode 69, which discusses some of the proposed differences between System 1 & System 2 cognition - https://www.youtube.com/watch?v=ud6iMydGx68