Based on the latest and most reliable findings of evidence-based science:
1. Clarify the role of memory in critical thinking.
2. Suggest solutions for a healthy, mentally active 71-y-o man to help him not only maintain but also develop his memory.
3. Clarify the role of memory in critical thinking for the case of this man – he wants to work intellectually until at least 100.
Work in English, output in Vietnamese.