Sage carries a narrow, specific reputation for memory in English herbalism, which is unusual - most folk uses are broad and vague. Spearmint sits alongside it, and Duke records more acetylcholinesterase-inhibiting compounds in spearmint than in any other plant we grow.
We are describing chemistry and tradition, not making a promise. What we will say without hedging is that a sharp mint infusion is a better desk drink than a fourth coffee.