It is like your motor control thoughts, you don't think let me pickup this spoon you just pick it up, when given an equation you do not think go through the steps if x - 9 = 22, you just say x is 31 yet you have skipped in your mind there exists a base mental representation of these things some call it a small world model of a large world model encoded in an abstract knowledge representation sort of like a compilers abstract syntax tree and this representation is sort of universal in that you can take it from someone and give it to another person and they will automatically know provided that they have the requisite properties of the world model in which it exists for instance a thought about the symmetric group s3 could be transferred provided that the requisite structure for groups( just the definition, and concept of rotation exists which already exists by default in mammals).