Hi folks!
harvey1 wrote:spetey wrote: In fact I explicitly deny belief-foundationalism. I think all beliefs must be justified. I'm just not positive that this justification must always refer ultimately to sense experience. I am agnostic about the very difficult question of whether some beliefs can be justified a priori.
That's fine. So, why don't you say that a belief in
a priori beliefs is
not justified until the adherents can convincingly show that a) they exist, and b) justification must
not always refer ultimately to sense experience?
I don't see why the default position should be empiricism. Some very smart people think there are beliefs that are justified
a priori. Other very smart people think there aren't. Why should I default with one such side when I don't have my own well-formed opinion?
harvey1 wrote:spetey wrote:You, on the other hand, have a very strong position on this question: you say there is no such thing as a priori justification. This is a very difficult and intricate question, and I have yet to see why you believe it so strongly.
Good pragmatists who believe knowledge is a result of experience should be inclined to reject
a priori ridiculousness.
Words like "ridiculous" and "obvious" do not carry the argumentative weight you think they do. There are many experts who think it is not at all ridiculous to think there are beliefs justified
a priori, and they certainly don't find it
obvious that there aren't. Why are they
wrong? (We'll look at the argument from that recent post in a moment, since you insist.)
harvey1 wrote:
Besides, if you can provide better evidence that a priori beliefs exist and that they are about the world, then I'd be happy to be agnostic about them. What ever happened to your "I need a reason, bit?"
I'm defending my agnosticism by showing you that it's hard to justify certain things by sense experience. It's hard to justify inference rules (like rules of logic) using sense experience. It's hard to justify mathematical axioms by sense experience (as we'll see, again). It's hard to justify "all bachelors are unmarried" by sense experience. It's even hard to justify "no beliefs can have
a priori justification" by sense experience. That makes them, at least
plausibly,
a priori claims.
harvey1 wrote:
You see, Spetey, this is why I am suspicious of the rigmarole that you put theism through. When it comes to other philosophical beliefs, you are more than happy to remain agnostic about those beliefs!
You are suspicious about my atheism because I don't have a well-formed opinion about
every philosophical topic? Do you also suspect quantum physicists who don't know everything about astronomy, or materials science, or biology? I think sometimes being agnostic is the responsible thing to be--namely, when you have no good reason to believe either way. But I have, I think, good
reason to believe there is no God. If you disagree, show me what's wrong with my reason (given
here and following) or give your own good reasons to believe in God on
this thread.
harvey1 wrote:
You are discriminating against theism. Do you see why theists often suspect atheists of having deeply personal resentments that fuel their disbelief?
I am "discriminating" against theism? You mean, I guess, that I'm
not a theist. That is correct, I'm not. But the weird choice of the word 'discrimination' makes it sound like I'm not being "fair" in this belief, or something. If so, show me. I give
reasons for my view. I want to hear your reasons for believing otherwise. Instead, you seem (suspiciously) much more interested in spending much more time investigating whether someone who holds my epistemology (but not me) might someday be committed to dogmatism about beliefs that have nothing to do with God's existence (like
a priori beliefs).
harvey1 wrote:
Again, if I made a statement that you were a dogmatist, then I apologize. I meant to always say that your agnosticism of a priori beliefs leave the door open for dogmatists to claim any belief as a priori, even beliefs that support dogmaticism.
Thank you, again, for agreeing I'm not a dogmatist. But I don't get this: if we're agreed that I'm not a dogmatist, what's the point of this discussion for the purposes of this thread? I know, you say my epistemology
might lead
someone else to dogmatism, despite its explicit commitment to giving justification for every belief. I suppose it's possible someone could hold this stupid combination of views, just as someone could be a physicist and an astrologist, I suppose. Why is that an objection to me or my view?
harvey1 wrote:spetey wrote:These are two very tricky things...
I only counted one.
Sorry, I didn't list them so clearly. The two I meant:
- Establish, contra Kant, Leibniz, Peacocke, BonJour, Jackson, Chalmers, et al., that there is no such thing as a priori justification.
- Show that if one is merely agnostic about the existence of a priori justification, one is thereby a dogmatist.
harvey1 wrote:
Since when must I argue against someone who can't prove there is other knowledge other than empirical?
You don't have to! If you're willing to let me remain an agnostic, then let me remain agnostic. If you want to convince me that
no belief could possibly have
a priori justification, then you have to give me reasons.
harvey1 wrote:
If you want me to argue that there is empirical knowledge, then I'll be glad to do so.
This is
very importantly different, and maybe again the source of the confusion. I think there is plenty of empirical knowledge.
Everyone thinks so. The question is whether there is
any tiny scrap of knowledge anywhere that is not derived from sense experience. You claim there is not, despite apparent examples like truths of math and logic and definitional claims. This is a strong claim that needs support.
harvey1 wrote:
The fact that you are agnostic about this issue (where it isn't even sensible to consider), while you are atheist about theism (where it is very reasonable to believe), just shows a tremendous inconsistency on your part.
And the inconsistency is what... that I don't have strong opinions about
everything? That I only come to have strong beliefs about something when I'm provided good reasons to believe them?
harvey1 wrote:
Even if you mark the grout blue for 1000 rows of tiles, if you haven't marked the grout purple for one column of tiles, you still should have a zero count of tiles. That axiom is trivially true, obviously, but it all stems from our experience.
If it's "trivially true" then how does it stem from our experience? I still don't see any areas of size zero. And even if I did see areas of size zero, or if it counts that I can tell by sense experience that "there are no tiles", that still doesn't justify (
x)(
x*
0=
0). For one thing, you have only demonstrated this for certain size tile matrices. But you have to demonstrate through sense experience that this is true for
all x. Furthermore, it's not obvious that justifying the rule that "zero times anything is zero" will justify that axiom. I wanted you to justify a
formal axiom, that happens to use symbols that look like our zero and times-sign, and that might be
interpreted as like our common practice of multiplication, but might not be--as in nonstandard arithmetics.
Here are a few more challenges of claims that might be
a priori. Please justify by appeal to experience:
- If p, then p.
- All bachelors are unmarried.
- Two sets are identical if and only if they share their members.
Now let's be clear on the point here: I'm not saying that it's
impossible to justify these from sense experience. I'm just saying it's at least
difficult and that should give us room to think that
maybe there are
a priori beliefs. I'm suggesting it's reasonable to think that maybe some beliefs can be shown true without appeal to experience.
As for philosophy of math, you seem to be in just as much trouble (as an empiricist) with platonic math and nominalist math. If you're a platonist about the objects of math, then you have to show how you
experience these platonic, non-material objects. If you think there aren't
really any objects of math, then it seems to me even harder to show how math axioms are true by appeal to experience. So this question seems orthogonal to yours.
harvey1 wrote:spetey wrote:I know you see it as "overwhelmingly obvious" that there is no a priori justification. But Plato and Descartes and Leibniz and ... and Peacocke and BonJour and tons of other extremely smart philosophers throughout the ages have not found it so obvious. So perhaps you can explain it to them (and me). Remember, we are committed to giving reasons for our controversial claims, instead of saying "it's obvious". If you can show it's obvious that there is no a priori justification, you should consider getting it published, because it would revolutionize epistemology.
You crack me up. Plato, Descartes, and Leibniz were theists. Do you accept their beliefs on theism as reasonable too?
This of course misses the point entirely. I do not believe in God. I don't think this claim is
obvious, since smart people like Descartes and Leibniz have thought otherwise. So I therefore try to back up my claim with reasons, as in those cited threads.
Similarly, you should acknowledge that it is not
obvious that there are no beliefs justified
a priori, given that lots of smart people have thought otherwise. So then, if you're not dogmatic about this stance, you should give
reasons for your position.
harvey1 wrote:
For me it's evident, from the lack of evidence and clear lack of conception, that a priori beliefs are some of the most ridiculous beliefs that linger from pre-evolutionary days.
I know that "for you" it is "evident" and that Descartes and Kant and all the others are "ridiculous". But they don't know that. So please explain it to them. Again, "evident" and "ridiculous" don't carry the argumentative weight you think they do.
harvey1 wrote:
But, if someone is going to argue a priorism and not be referring to knowledge that is of biological origin, then they better give pretty strong supporting reasons why they think such knowledge was not acquired by evolutionary processes.
You could think that
a priori beliefs are hardwired by biology, as I said long ago. Then they are not acquired by sense experience.
harvey1 wrote:
I would recommend that you take another look at my five-point argument. It gave a rough (rough) draft why you cannot have a priori knowledge unless you are thinking in supernatural terms.
Oh yes, the "argument" that there is no
a priori justification <sigh>. Frankly I overlooked it out of charity to
you; I thought it was a late-night post that you would be embarrassed about later. But if you insist, let's take a look at it again. I'll put my comments after the points.
harvey1 wrote: - Bob claims a priori knowledge about p.
- Upon further evaluation there is indeed no way that Bob should possess p knowledge from any explainable means. spetey says: so far you have stipulated an example where Bob claims to have knowledge he can't possibly have, so his claim must be wrong.
- Bob claims that each night while sleeping (since he can remember) a little bit of p knowledge has accumulated up until today.
- Receiving p while sleeping is therefore a perception of Bob. Therefore, Bob has an unexplainable "sixth sense" of perception to receive p. spetey says: here you contradict the earlier stipulation of your own example that there is no way Bob could have attained this knowledge. Instead you now stipulate that if Bob can get this knowledge, it must be through some sense, perhaps a sense of a type of which we're not yet aware. By assuming that the knowledge must have been acquired by some kind of perception, of course you beg the question at hand.
- Hence, Bob cannot claim p as a priori knowledge since p conforms to an empiricist account of knowledge (i.e., knowledge comes from perceptions, including a speculated "sixth sense"). spetey says: in effect you have stipulated an example of a person who got knowledge through a sixth sense. How does this even come close to showing that no belief could ever be justified a priori?
Compare this "argument": Bob says there is a fairy living in his cookie jar. But, as I stipulate the example, there isn't a fairy living in his cookie jar. Therefore, I conclude there are no fairies anywhere.
harvey1 wrote:
Even the idea of knowledge being inside the biological brain suggests that it got there biologically. If knowledge comes to reside in the brain from a source other than experiences, how would you suggest that happens from a biological perspective?
Hardwiring, for example.
harvey1 wrote:
I'm not a metaphysical naturalist by any means, but I do think that our interaction with eternal stuff happens by our interaction with the world and not by soul migration.
Funny you should draw the line there. Why can't God just give us knowledge, say of God, or of the average rainfall in Virginia, without our having to experience it? If that is even
possible then it seems possible we can have
a prioiri knowledge, according to you.
harvey1 wrote:spetey wrote:It's my extended willingness to defend my agnosticism with respect to this topic, despite its irrelevance to anything we really came here to discuss, that I think demonstrates that I am committed to giving reasons for any controversial claim, and therefore am not a dogmatist. On the other hand your repeated insistence on a claim you find "obvious" still strikes me as dogmatic.
That's funny. I'm dogmatic because I say that a concept makes no sense (because it doesn't), there isn't a shread of evidence (because there isn't), and that makes me dogmatic?
Yes! Just saying "it makes no sense" and "there isn't a shred of evidence" and "it's evident" and "it's ridiculous that not" is dogmatic. Racists are good at making those kind of "arguments" too! Now to your credit, you did make an argument, which you apparently wanted me to take seriously. But I think you can see why I didn't take it seriously, right? So let's hear good reasons or let's drop it.
harvey1 wrote:
And, as far as what we consider reasonable, sure, we can be agnostic on every possible belief since we need to be fallibilistic with respect to our experiences, however that is really not necessary. We can eliminate the ridiculous (e.g., we are in the Matrix) and spend our time more fruitfully by doubting only those things that we really are not so sure about (e.g., string theory, quantum loop theory, etc.) and not spend that time debating the ridiculous (e.g., whether or not knowledge is acquired magically).
Good, good! Maybe
this is the confusion. I agree with all of this. (Except I wouldn't say we should be "agnostic" about every belief--I just think every belief should be
open to revision.) But I am 100% with you that no knowledge can be acquired in a non-naturalistic, "magical" manner. (I am surprised that
you hold that position, however.) That's not obviously the same question as whether there are
a priori beliefs, as I said earlier. So maybe that's the confusion. If you just want me to say that no knowledge can be acquired by non-naturalistic means, I grant it happily!
harvey1 wrote:spetey wrote:Somehow you get from sensory beliefs to all your other beliefs. You presumably have inference rules for these. What is the experiential justification for those? (Those, note, are just the kind of thing people often claim are a priori--laws of logic and such.)
Well, you see Spetey, that's the job of some new branch of paleo studies ...
This confuses scientific
explanation of our inferential practices with their
justification. We're also biologically inclined to murder, as can be explained scientifically--does that mean that all murder is
justified? I want to know how you
justify our experiential practices by appeal to sense experience. Several of our inferential practices seem unjustified, as our very human tendencies to commit various
fallacies attests. There may be evolutionary reason, some speculate, that we're not good at reckoning probability, for example.
I sure hope that this was just a misunderstanding, and that you just want me to agree that no knowledge can be acquired
non-naturalistically. I grant that. As I said earlier, if it could be shown that
a priori justification would violate naturalism (as some do indeed claim, though others disagree), then I would take
that as reason to reject the existence of
a priori justification for beliefs. (Maybe I shouldn't have said that's what I hope, though, since you have a track record of taking some position back once I agree with it!)

spetey