Reverse Cognition

When we consume data, it increases with time. We listen to one word, then the second word - that leads to some partial cognition - then the third word and so on. Then we cognize one sentence. Then 2 sentences, and so on. As (more and more) information comes in, the meaning unravels more and more. 

But meaning can unravel even when we delete (or discard as wrong) information from our minds. So why don't we study reverse cognition? That is, the unraveling of meaning upon decrease of data from the system (mind)? Especially when we grow up, we learn that so much of what we thought about the world as children, was plain false/wrong.

(Maybe that can help in the debugging of programs.)