Redundancy improves signal
Sometimes shouting when you need something once isn’t enough.
When I was a kid, my parents would yell something, like, “Could you help me with…”
I would miss the message. Somehow, when my father shouted it again, at the same volume, I heard it, as clear as a bell. It wasn’t because I was deaf, it just got lost from them shouting and my hearing. Getting it a second time allowed my brain to concentrate and differentiate the signal from the noise.
And if you didn’t know, I just taught you information theory. Claude Shannon, the mathematician who figured this out, is responsible for the internet and us communicating now.
Every signal we get from the outside world is a gamble.
To increase the percentage of something making sense, add some redundancy.
Who knows, maybe they didn’t get that email?