No, that's experience.
That's my point. 5e took out the defense of Int to make it easy for new players to learn. But it was a dumbing down Anyone who fights knows smartscan be very important in fighting.
That how Floyd Mayweather made all his money. "On my turn I fight defensively."
Somehow he has high Int, high Con, meh Str and zero skill profieciencies.
You needed to be smart to analyze foes in 3e and 4e.
5e gives it to everyone. Further simplifying the fighter and limiting the other classes' ability in combat.