I spoke only of vision & it's complexities.Well, there are 2 relevant definitions of see.
-perceive with the eyes; discern visually.
-discern or deduce after reflection or from information; understand.
So you can see a gun and you can see 2+2=4 is true. But is not the same definitions, so yes, definitions matter and sometimes it matters that there are several for the same word. Go figure.