system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] So, how intelligent are Mentats naturally?

Is sapho juice just INSANELY effective, or are they naturally like savants?
gpt
Think of human savants of our world. They can do one task better than any other human on the planet - some can match insanely huge numbers. Some can reproduce any music after hearing it once. Some can sculpt incredible works of art. But the *most* savant person is incapable of doing anything other than that. They cannot function in society. The guy who can multiple two 10-digit numbers instantly can't even dress himself.

Imagine is a person can do all that savant stuff, and still being able to function normally. That is a mentat. They have unlocked all the savant side of their brain while not turning off the functioning part of their brain. That is what the juice of sapho does.

But just like people, not all mentats are created equal. Some are vastly superior to other people. Piter De Vries would be if you or me  became a mentat. Thufir Hawat is the Stephen Hawking of mentats.  So much that the Baron gloats about having him in the '84 Dune.