Shermer, Simons, and Chabris discuss: • How rational vs. irrational are humans? (Daniel Kahneman vs. Gerd Gingerenzer) • Truth Default Theory, or Truth Bias • deception vs. deception detection • social proof and the influence of others on our beliefs • cults • Bernie Madoff • Harvey Weinstein • Elizabeth Holmes and Theranos • Nigerian spam scam • cheating in chess • habits of thought that can be exploited • information hooks we find especially enticing instead of triggering skepticism • scientific fraud and the replication crisis • how to prevent from being a victim of fraud or a con.