Possible Clues:

• Reason I pass; lecturer reflecting on college
• System/method of reasoning
• Systematic way of reaching the wrong conclusion with confidence, in a version of Murphy’s Law
• Puzzle solver's skill
• Formal reasoning
• Rigorous working out I run over in large chapter
• '___ is the beginning of wisdom ... not the end': Spock
• Left over fag rolled — it helps me think clearly
• Spock’s specialty
• Look at American soldier with cold reason