Sensation & Subjectivity - Are sensations purely subjective things? How about beliefs? Could you have one without realising it? Could you think you have one, when really you don't?
Inclination vs Duty - Is it better to act morally because you want to, or because you feel obliged to?
Truth & Relativism - On the absurdity of extreme relativism, but the usefulness of a more limited sort, which can help us to understand value-claims objectively.