What happened next is a matter of great controversy. The methods of interrogation used on KSM have been the subject of lawsuits, congressional investigations, and endless public debate. Those who approve refer to the measures as “enhanced interrogation techniques”—EITs. Those on the other side call them torture. But let us leave aside those broader ethical questions for a moment, and focus on what the interrogation of KSM can tell us about the two puzzles.
