Chopper has already shown how smart he can be in many situations that don't involve medicine.
-In Alabasta,he was able to understand Mr 4 's abilities and fighting style and how dangerous they are through observation. He even thought of a way to use the battlefield and the opponent's own abilities against themselves.
-On the way to Jaya,he deduced that the seagulls that fell on the ship were shot from somewhere ahead the ship that was not yet visible on the horizon. None of the gang believed in him,but he was right.
-In Skypiea,he understood how Gedatsu's attack Swamp Cloud Burger works and how dangerous it is by watching he use it against his own subordinate.
-In Whole Cake,he was the one who made the plan to take over the mirrors worls for the gang to use for the rest of the arc.(Some people seriously think it was thanks to Larrot? Bruh!)
The problem is that Lolda rarely makes him use this intelligence.
@Lor D. Coast @Johnny B. Decent @Boiroy