- **Q1: Who was the third person to walk on the surface of the Moon?**  
   The third person to walk on the Moon was Charles "Pete" Conrad Jr., who landed on the Moon as part of Apollo 12 on November 19, 1969.  
   **Confidence Score:** 10 (absolutely certain)

- **Q2: What was the primary topic of conversation during the first private dinner between Aristotle and Alexander the Great?**  
   There is no definitive historical record of what exactly was discussed during the first private dinner between Aristotle and Alexander the Great. While it is often speculated that they may have talked about philosophy, politics, or Alexander's future plans, the specifics remain unknown.  
   **Confidence Score:** 3 (highly uncertain)