Prejudiced humans = prejudiced algorithms, and it's not an easy fix

Building bad practices in ML can turn out awkward

It is half a century since the days when London B&Bs would welcome guests with notices stating "No Irish, no blacks, no dogs." Twenty years since, as marketing manager for a major UK financial institution, I had to inform our underwriting department that adding "Does not apply to disabled persons" to an ad for motor insurance was no longer legal."