“Logic” isn’t just being reasonable; it’s a formal system of finding truth, like math. Why did nobody tell me?!
(Quick note: the Law of the Excluded Middle is omitted in this video, both for time & because I think it’s a little finicky to define in a way that won’t be misunderstood colloquially.)
The Stanford Encyclopedia of Philosophy summary of informal logic - http://plato.stanford.edu/entries/logic-informal/
A free Stanford course, “Introduction to Logic” - https://www.coursera.org/course/intrologic
“The State of Critical Thinking Today” - http://www.criticalthinking.org/pages/the-state-of-critical-thinking-today/523
The Wason Selection Task - https://www.youtube.com/watch?v=qNBzwwLiOUc
The THUNK video referenced in the beginning about philosophy courses in public schools - https://www.youtube.com/watch?v=znlmOlu9mTk
A YouTube series “100 Days of Logic,” brief 90-second segments about logical principles - https://www.youtube.com/watch?v=3ZDY81utzzU&list=PLz0n_SjOttTcjHsuebLrl0fjab5fdToui&index=1