Your brain is smarter than you think. Here’s an example from Philadelphia’s Franklin Institute:

In this audio illusion, something that seems incomprehensible makes sense once your brain is conditioned for it. Prior information shapes our understanding of the present.

In screenwriting — or any form of storytelling — we call this set-up. A reader’s understanding of a given moment is hugely dependent on what you’ve already established. That’s why the first few pages of a script are so important: you’re teaching the reader what to look for, and ultimately how to read your script.

From WHHY The Pulse.