Abstract

An empirical science must be at once grounded in sensory evidence and rationally justified by that evidence. But, as Hume famously argued, the fruits of empirical science would seem to be generalizations that cannot be rationally grounded in sensory experience. For, as Quine puts the point, “the most modest of generalizations about observable traits will cover more cases than its utterer can have had occasion actually to observe”. Quine’s response to the difficulty is essentially Hume’s: give up the project of trying to understand the rationality of natural science—its obligation to the norm of truth—and aim instead to explain the mechanisms by which the natural scientist’s beliefs are formed. Sellars has a very different response: uncover the hidden assumptions that led to the skeptical conclusion in the first place. As Sell- ars argues in his master-work, “Empiricism and the Philosophy of Mind”, first published in 1956, the fatal flaw in the empiricist program lies not in its overarching aim of understanding the rationality of the pursuit of empirical knowledge but instead in its foundationalist conception of what it would be to achieve that aim. The fundamental and most profound lesson of EPM is that “empirical knowledge, like its sophisticated extension, science, is rational, not because it has a foundation but because it is a self-correcting enterprise which can put any claim in jeopardy, though not all at once”.