 Even if evaluative conclusions that deploy thin terms such as right and wrong cannot be derived from purely non-evaluative premises, a conceptual gap between evaluative and non-evaluative statements requires the same to be true also of evaluative conclusions that deploy thick terms. Philippa Foot argues that thick terms such as rude undermine the is-ought gap: calling something rude is evaluative because it expresses condemnation in the same kind of way as bad and wrong do, but this evaluation can be derived from a non-evaluative description (Foot 1958). Consider the following inference: