I always thought this

but still... you can explain complex ideas like "last week" and "forever" and the Double Down sandwich from KFC

It's just a pattern we agreed upon. Like thumbs up = good. We could even talk with our eyes if we wanted to.

We can but how do you say last week instead of last month? Or explainyour dangerous love of bacon with blinks.

Think something like morse code or binary. Really, communication is just patterns of something we agree upon.