Yes, rats and squids also have a mental representation of reality "in their head", and I bet you they don't doubt its faithfulness to reality too often in their life. They don't have the luxury of being armchair philosophers I guess...
Mental images and smells and sounds and feelings are all there for a reason: a question of survival. Find cheese, avoid cats.
This mental world of ours, this spatial information management system inside our head, this virtual, sensual reality with its colors coding of light wave length, its cool stereophonic surround sound rendering of air waves, its chemical analytics disguised as the smell of a rose... is both fake on a fundamental (ontological, Fresco would say) level, and truest to the real world out there, most functional for survival, and hundreds of times more beautiful than anything you could replace it with...