Matt reminded us that he’s made this point before, on Searchblog four years ago:

“When savvy people think about Google, they think about algorithms, and algorithms are an important part of Google. But algorithms aren’t magic; they don’t leap fully-formed from computers like Athena bursting from the head of Zeus. Algorithms are written by people. People have to decide the starting points and inputs to algorithms. And quite often, those inputs are based on human contributions in some way.”