Eliezer, I guess the answer you want is that "science" as we know it has at least one bias: a bias to cling to pragmatic pre-existing explanations, even when they embody confused thinking and unnecessary complications. This bias appears to produce major inefficiencies in the process.

Viewing science as a search algorithm, it follows multiple alternate paths but it only prunes branches when the sheer bulk of experimental evidence clearly favours another branch, not when an alternate path provides a lower cost explanation for the same evidence. For efficiency, science should instead prune (or at least allocate resources) based on a fair comparison of current competing explanations.

Science has a nostalgic bias.