The funny thing about bias is that it was invented, technically, as a way of... improving the accuracy of data in audio recordings. By adding something (current or frequency) to the signal you could increase the quality of the output. Without chasing the metaphor too much, it's also interesting to considerer that, maybe, adding something, yes a bias, to the data would also increase their quality. Why did authors (e.g. Azimov) came up with fundamental robotic laws?