It is argued that a better theory neither (I) proves better at enabling us to realize our goals, nor (II) enables us to make more accurate predictions than a worse theory. (I) fails because it, tacitly, erroneously assumes, in talking of our goals, that individual preferences for theories can be aggregated into a social preference ordering; (II) fails because it cannot distinguish between important and unimportant predictions. Neither of these failures can be patched up by appealing to the notion of (...) a true theory. The conclusion is that we as yet possess no adequate understanding of the relationships among theoretical progress, goal realization, and predictive accuracy. (shrink)

I argue for a type of relativism that allows different people to have conflicting accurate representations of the world. This is contrary to the view of most Anglo-American philosophers, who would, with Paul Boghossian in Fear of Knowledge, deny that “there are many radically different, yet ‘equally valid’ ways of knowing the world.” My argument is not a metaphysical argument about the ultimate nature of the outside world, but a psychological argument about the mental processes of representation. The argument starts (...) from a few principles of naïve (or folk) psychology, but is later extended to apply to mechanisms that do not have a “psychology.” Finally, I briefly discuss the anti-relativist impulse in philosophy, with particular reference to Boghossian’s example of non-scientific beliefs regarding Lakota origins. I argue that both we and the Lakotas have good reason to reject such beliefs while still remaining relativists. Being a relativist does not mean that you get to believe whatever you like. (shrink)

Rational argument doesn't often change minds. I explore the reasons why the usual processes of argument seldom convince people on the other side.

Relativism is a theory about how people organize their beliefs. We construct mental representations of the world—particular configurations of our internal brain stuff—to guide our actions. But our brains contain only a minuscule part of the world’s stuff. Given the limited brain stuff available, we can have detailed representations of some features of the world only if we simplify our representations of other parts. Our internal representational means are thus too meager to accurately represent reality in full. Which representations we (...) adopt will therefore depend upon our purposes: different purposes, different representations, different beliefs. Such a relativism does not deny the reality of the outside world, is not self-contradictory, and allows for progress, moral persuasion, and cross-cultural criticism. (shrink)

A rational man’s beliefs are not logically consistent, and he does not believe all the logical consequences of his beliefs. This is because in any situational context, we only accept certain believed sentences. Within that context, we insist that sentences be logically consistent, and we accept the logical consequences of the other sentences we accept in that context. But such sentences do not have to be consistent with sentences we accept in other contexts, nor will we always accept in that (...) context the logical consequences of sentences that we accept in other contexts. We go through many different situational contexts in the course of a day. For example, in trying to start a car with a dead battery, explaining why the car won’t start may form one context, while explaining how to start it may form a different context; sentences we accept in the first context may be logically inconsistent with sentences we accept in the second. (shrink)

I argue that quine's thesis of the indeterminacy of radical translation is incorrect. the argument exploits the connections between quine's thesis and common sense notions regarding belief. a simple model of belief, taking beliefs to be sets of brain states, is used to give a rigorous restatement of quine's thesis. it is then argued that our need to project the actions of other people from their professions of belief would make the situation quine describes unstable, since persons in that situation (...) would make less accurate predictions of actions than would persons not so situated. (shrink)

A general introduction to the philosophy of David Hume.