Companions in Guilt

Hume‘s guillotine can be stated that it is impossible to deduce an ought from an is—the implication being that no normative claims can be true. The issue with this view is that it wipes itself out—the Humean is asserting an epistemic norm that you should only believe in certain types of claims:

You should only believe in the existence of stuff you or someone trustworthy have experienced or that must exist in order to explain the stuff that we have experienced.¹

It is simply arbitrary to make an exception for that epistemic norm as being truthful whilst rejecting every other normative claim.