In the 20th Century there were cases whereby isolated cultures who had never seen a photograph were presented with one with people in it and the viewers had absolutely no idea that those 'images' were representations of people.
I do wish I could quote sources here but the fact is this: When we are presented with a photograph, we ALREADY know (subliminally, through previous training) that our brains must 'translate' the data into real world experiences and we do so accordingly and easily. This 'translation knowledge' is difficult for us to realize as a separate step because it is so habitual.
This is why sometimes intelligent people are really rather ignorant with how to teach topics to uneducated people, because they are caught in the trap of assuming too much. One has to be able to revert to ignorance in order to be able to uplift ignorance. Ironically, here, ignorance is a type of (seminal) knowledge. - David Lyga