Summing all the things is similar to just a big "OR" right? It lets the important signal through (you don't know which it is) and the other ones just have to be

Summing all the things is similar to just a big "OR" right? It lets the important signal through (you don't know which it is) and the other ones just have to be suppressed or suppressed enough to not interfere. For example all the other ones might as well be as if stochastic, so on average you get it right.