What is the 2 stage theory in psychology?

I'm pretty sure it's the "Preoperational stage" ages 2 to 7.

The Preoperational stage is when the Child starts to think more symbolically and learning different words and pictures to represent objects.  When they hit this stage they start to be egocentric .

what words? are you talking about to complet what sentence

answer; exaggerate what you believe is the deception and state it, hoping that the other will jump in to "correct" the statement;