Earlier quoted context omitted.
when the map tells you one thing, and your eyes tell you another thing, go with what your eyes tell you, because the map is full of shit. you would be surprised how often people trust "the map" more than reality. "the map" can be anything, i.e. an instruction manual, an authority figure, folklore, a rumor, whatever.
Except if you're a pilot flying in low visibility. Then you trust the map, not the terrain (mainly as the terrain is invisible). VFR vs. IFR and all that.
In that case your eyes are telling you that they can't see anything and you need to use the map.
Eyes still win!