I'm fairly certain they're using a mathematical meaning for bias. Yes, all preference in this case is "bias" because it affects the system in a consistent way.

I'm fairly certain they're using a mathematical meaning for bias. Yes, all preference in this case is "bias" because it affects the system in a consistent way. If you're an engineer, you're probably already familiar with this form of bias: a system that always exhibits a preference for some type of inputs, for example, a computer vision system that always categorizes green-tinged images as "cats", is exhibiting bias, not "preference" -- as in this simulation, there's nothing personal going on, it's literally just numbers in a matrix.