At the moment, I'm particularly concerned about the 'personal heresy' in philosophy. Recently, Thabo Mbeki, the South African president, gave a speech in which he quoted several racist statements by key philosophers of Western civilisation. David Hume, for instance believed that "of all the 'breeds' of man, the darkest breed was inferior.."(quote from Mbeki's speech) and it's also believed that Kant believed black people were 'beasts'(again, Mbeki's belief). Whether these quotes are accurate or not, it's indubitable that the milieu in which these philosophers formed their various normative frameworks was a deeply prejudiced one. If philosophy proceeds from deductivism, i.e a set of axioms are laid out, rules of inference determined, and from these various judgements made, is it possible that inherent within western thought is a kind of racial prejudice? And if so, is it possible to account for it, using some kind of 'personal equation' of the kind invoked by Gauss in his work with astronomy?