HHarvard OnlineStructure and Function of Argument: Introduction to Critical ThinkingHarvardX introduction to mapping, analysing and strengthening everyday arguments.Paid certificateWriting & Humanities20 hrsBeginner
COCourseraIntroduction to Mathematical ThinkingKeith Devlin's Stanford course on how mathematicians think: logic, quantifiers and proofs.Paid certificateMathematics37 hrsIntermediate