Epistemic relativism, scepticism, pluralism

There are a number of debates that are relevant to questions concerning objectivity in science. One of the eldest, and still one of the most intensely fought, is the debate over epistemic relativism. -All forms of epistemic relativism commit themselves to the view that it is impossible to show in a neutral, non-question-begging, way that one "epistemic system", that is, one interconnected set of epistemic standards, is epistemically superior to (all) others. I shall call this view "No-metajustification". No-metajustification is commonly taken to deny the objectivity of standards. In this paper I shall discuss two currently popular attempts to attack "No-metajustification". The first attempt attacks no-metajustification by challenging a particular strategy of arguing in its defence: this strategy involves the ancient Pyrrhonian "Problem of the Criterion". The second attempt to refute No-metajustification targets its metaphysical underpinning: to wit, the claim that there are, or could be, several fundamentally different and irreconcilable epistemic systems. I shall call this assumption "Pluralism". I shall address three questions with respect to these attempts to refute epistemic relativism by attacking no-metajustification: (i) Can the epistemic relativist rely on the Problem of the Criterion in support of No-metajustification? (ii) Is a combination of Chisholmian "particularism" (i.e. the insistence that we know lots of things) and epistemic naturalism an effective weapon against No-metajustification? And (iii) is Pluralism a defensible assumption?