2. Feeling IS fast thinking (rapid “reasoning”). Per Kahneman, our “System 1” generates feelings = rapid, intuitive reflex reactions. Our “System 2” does slower, reflective, conscious, deliberative thinking. 3. “Logic” and emotion aren’t simple opposites. Feelings process sense data according to some logic (the emotional grammar of stories, “people physics”). And deliberative thinking often isn’t “logical.” Either can be logically apt or inept. 4. Logic has four elements: assumptions, arguments, skills, and goals. All logic is local to its assumptions. Only the appropriately skilled can construct arguments from assumptions to goals. Calling something “illogical” can mean disagreeing about any of those elements. - bigthink.com