Showing posts with label Dretske. Show all posts
Showing posts with label Dretske. Show all posts

Wednesday, June 26, 2013

Scripturalism and Plausibility

Plausibility is fickle. What sounds right to one person can sound ridiculous to another. I would say the most plausible explanation for this is that while people want to be [or at least appear to be] consistent, they vary in respect to certain beliefs. How well some proposition coheres with beliefs about which one is relatively inflexible will influence how disposed one will be to accept it.

Now, psychology doesn't really interest me. If I make a good argument, I shouldn't feel responsible for how a person responds to that argument. And, in general, I don't. Then again, there's not much point to making an argument in the first place if I have no hope that it will succeed in convincing the listener. I may better convince myself, but in any case, it is natural to want something more. 

What I am getting at is that while arguing for Scripturalism is fine, to convince more people, it seems that some time should be spent in making it more plausible. Who, after all, would admit to believing what he thinks is implausible? 

But how would one go about making something more plausible? Is there an exact science to it? I don't think so. In fact, my advice here is based on intuition and experience, but that should be fine since the goal is not to explain how to erect a sound argument but rather how to take a sound argument, the conclusion of which you think a person opposes, and make the conclusion more plausible. There's room for generalizations, allowances for context, etc., here. So most of what follows will be rather informal.

In general, for example, I wouldn't recommend stating the conclusion first. People don't like to backtrack, so instead of immediately provoking them into disagreement with a conclusion and, by extension, one of the as-yet unstated but underlying premises of a valid argument, it would seem better to state those premises which you believe are both agreeable and integral to the conclusion, and then show why they entail the conclusion. Take the following, well-written statement by Fred Dretske:
If your reasons for believing P are such that you might have them when P is false, then they aren't good enough to know that P is true. You need something more. That is why you can't know you are going to lose a lottery just because your chances of losing are 99.99 percent. Even with those odds, you still might win (someone with those odds against him will win). That is why you can't learn - can't come to know - that P is true if all you have to go on is the word of a person who might lie about whether or not P is so. This is just another way of saying that knowledge requires reasons or evidence (in this case, testimony) you wouldn't have if what you end up believing were false. You can learn things from people, yes, but only from people who wouldn't say it unless it were true. (Contemporary Debates in Epistemology, pgs. 43-44)
This is what I would call a plausible argument. You can't know a proposition if it is false, so you can't know a proposition if there is, for all you know, a chance that it is false. A simple, common-sense argument for infallibilism buttressed by an example of how his argument applies to something like the lottery. Examples are good tools when trying to make an argument plausible.

For the purposes of Scripturalism, Dretske cites an even more useful illustration: the possibility of learning from people, where learning implies knowledge-acquisition. Dretske acknowledges it is possible to learn from people, but only from people who wouldn't lie. An excellent deduction from his previous remarks. But would Dretske agree that only one who cannot lie - say, God - satisfies? How else could Dretske be in a position to know who would and wouldn't lie? He may have a suspicion or opinion one way or another, but the real question is would he infallibilistically know? Since we've come this far in agreement, could Dretske really just go back and forget his own arguments? [I don't know how Dretske would respond to any of these questions, of course.]

Or take the following by Richard Fumerton:
We will agree here, therefore, that we cannot avoid knowledge skepticism with respect to the physical world if we understand knowledge as requiring justification so strong that it eliminates the possibility of error.  
Of course, the moral most contemporary epistemologists draw is that we should reject Cartesian standards from knowledge. Our only hope of avoiding skepticism with respect to knowledge of the external world (the past, the future, other minds, and so on) is to accept more relaxed standards for knowledge. (Contemporary Debates in Epistemology, pg. 86)
That one contemporary epistemologist admits there can be no empirical "knowledge" in the strong sense in which Dretske, another contemporary epistemologist, intends above is quite a concession. While this doesn't show that empirical knowledge is impossible - again, a sound argument can do that even without a so-called plausible presentation - what it does do is show a willingness to respectfully engage and even heartily agree with acknowledged top minds of a given field.

We can even allow for discussion as to more relaxed standards for a colloquial understanding of "knowledge" so long as we in turn can push the point that everyone implicitly holds some beliefs must adhere to the stricter standards (infallibilism, cf. here). I am not aware of any Scripturalist who would necessarily deny we can "know" about an "external world" in a loose sense, but that's because, as I pointed out in my last post (link), Scripturalists are more interested in defeating skepticism. That is, they are more interested in "knowledge" in the "strong" sense outlined by Dretske and alluded to by Fumerton. Focusing a discussion on a few, key points and agreeing with peripheral issues when appropriate will be more conducive when attempting to explain why Scripturalism is true, because at the same time you alleviate concerns that it doesn't cohere with pre-established beliefs.

Thursday, March 14, 2013

Thoughts on Contemporary Epistemology


I recently received Contemporary Debates in Epistemology as a birthday present. I was curious was the hot topics are among the epistemologists of today and figured that sooner or later I should branch out my reading if I seriously intend to pursue a degree in philosophy. Anyway, there are eleven topics debated in this book. I won’t go through all of them, not the least reason for which is that I don’t feel I have an adequate grasp of all of them. But among these topics are closure, skepticism [with respect to the external world], contextualism, and infinitism. With so many opinions, it’s hard not to find someone to [dis]agree with. It’s a mixing and matching. You have to read critically, i.e. you can’t just cross someone off for making one point with which you disagree. I disagreed with Dretske regarding closure, yet I think he makes a good argument against contextualism. The same goes for my readers. I’m sure I made bad points. Hopefully, I made some good ones too, and I hope further these points are not overridden by my bad ones. Now then, with respect to this book, you’ll have to get it to read specifics one way or the other, as I’m just going to comment on a few points that were of interest to me:

Closure

Closure is the idea that “If S knows p and knows that p implies q, then S is in a position to know that q” (pg. 2). On the face of it, this seems obviously true. Another author, Richard Fumerton – whose helpful distinction between necessary and sufficient conditions for knowledge I have quoted on this blog before (link) and whose books Epistemology and Metaepistemology and Skepticism would seem to be worth a look – remarked in a footnote of an essay on a different subject that “the bottom line is that if a philosopher advances a view that forces us to reject closure, that should be taken as a reduction of that philosopher’s view” (pg. 96). A very well made and succinct point.

The reasons why one would reject closure, however, make it a worthwhile discussion. One reason to reject closure is that it allegedly makes possible “ordinary knowledge.” If we reject closure, we could in principle know, for example, that “John ate all the cookies” without having to know “There are physical objects,” “There are other minds,” or “The past is real” (pg. 3). “John ate all the cookies” may implies these propositions, but we don’t have to know these propositions to know “John ate all the cookies” if closure is rejected. Likewise, we wouldn’t have to worry so much about Descartes’ demon, solipsism, and recently spontaneously generated universes.

Of course, we could accept closure, these “heavyweight implications” of so-called ordinary knowledge, and on these accounts reject ordinary knowledge as infallibilistic. In fact, as a Scripturalist, that seems highly preferable. Much of what we say or do are not based on beliefs which can’t be mistaken. Clark was right to throw the objection that he couldn’t know his wife back in the faces of his critics. So what if our knowledge of such isn’t infallible? The more interesting question is what knowledge is infallible.

Skepticism

This brings me to the issue of skepticism with respect to the – or perhaps “an” would be less question-begging - external world. Surprisingly – pleasantly surprisingly – the two authors seemed to agree that “we cannot avoid knowledge skepticism with respect to the physical world if we understand knowledge as requiring justification so strong that it eliminates the possibility of error” (pg. 86). [This too was written by Richard Fumerton.] His reference to a sort of justification which would preclude the possibility of error is another allusion to infallibilism, which I wrote about here a few months ago. Scripturalists will do well, I think, to focus on metaepistemology – the definitions of knowledge, epistemic justification, truth, and the like. It may turn out there is more agreement to be had with the scholastic paragons of contemporary epistemology than one could hope for.

Contextualism

If I understand contextualism correctly, it rests either on an equivocation of the meaning of “knowledge” or is a flat contradiction, neither of which is particularly useful. It basically says (pg. 45):
…whether S knows something – that she has two hands, for instance – depends on the context of the person who is saying S knows it. If I, a philosopher, worried about brains in vats and Cartesian demons, say it, then S doesn’t know she has two hands… But if S, an ordinary person on the street, someone without the least tincture of philosophy, says she knows that she has two hands, what she says is true. She attributes knowledge to herself in an ordinary, practical, context, in which demons and handless-brains-in-vats are not relevant possibilities… 
So who, according to contextualism, is right? Am I, a philosopher, right when I (given my context) say that nobody knows they have hands. Or is S right? We are, I’m afraid, both right. And that is where my low opinion of contextualism comes from.
If there is an equivocation – if what S means by “knowing” she has two hands is different from what the philosopher means when he says S [does not] “know” she has two hands – then rather than preserving knowledge of having two hands, it just highlights that S is probably not squarely facing the skeptic’s challenges (cf. the “heavyweight implications” in the section on Closure above).

Infinitism

Of all the debates I skimmed, this and perhaps the debate on a priori knowledge seemed to arouse the most incredulity from any of the debaters. The ideas that infinitism could be true or that there is no a priori knowledge are, thankfully, seemingly minority positions. With respect to infinitism in particular, the closing paragraphs from the detractor will close out this post (pg. 155):
In my essay I said that the (to my mind) most severe difficulty with Klein’s infinitism is that it is committed to the thesis that inference alone can create justification. Here Klein seems to embrace this commitment wholeheartedly, holding that the longer the chain of inferential justification for a given belief the greater the justification created, and that, if the chain is long enough (but still finite), the justification can “increase to the degree required for knowledge.” This seems to give us the result that knowledge does not require infinitely long chains of inferential justification after all: infinitism gives way to inferentialism. Worse yet, given Klein’s thesis that inferential justification is the only sort of justification there can be, we seem to get the result that one could start with a belief (or set of beliefs) that is totally unjustified, because it lacks any inferential justification, and by spinning out a long enough chain of inference from it reach a belief that has the degree of justification required for knowledge. 
These results are so counterintuitive that I hesitate to attribute them to Klein. But how else are we to interpret the quoted remarks?