Re: [singularity] No non-circular argument for deduction?

2007-03-05 Thread gts
Eugen, And just how do you do the compelling thing? Do you use corporeal punishment, or do you settle for posthypnotic suggestion? In my post to Jef, I used the word "compel" as it is used in the sentence, "The defense attorney made a compelling argument, so I voted to acquit." What is i

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread gts
On Sat, 03 Mar 2007 12:10:12 -0500, Jef Allbright <[EMAIL PROTECTED]> wrote: Gordon, I've never tried to persuade you that my "arguments are true" So you post all these ascii characters to me with no hope of convincing me of anything? Sorry but I hope you don't really expect me to believ

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread BillK
On 3/3/07, Jef Allbright wrote: Gordon, I've never tried to persuade you that my "arguments are true"; on the contrary, I've said more than a few times that my point is that it's not even possible to do so in the absolute sense that you claim. I've said to you several times that we can't prove "

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread Jef Allbright
On 3/3/07, gts <[EMAIL PROTECTED]> wrote: Do believe in what people sometimes call 'the force of logic', Jef? Do you believe every rational mind is as a matter of definition compelled to accept the conclusions of sound arguments? I do. If you do too then we have no disagreement. If you disagre

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread Eugen Leitl
On Sat, Mar 03, 2007 at 10:58:43AM -0500, gts wrote: > Do believe in what people sometimes call 'the force of logic', Jef? Do you I'm not Jef, but I have no idea what 'the force of logic' is supposed to mean. Can you define it, preferrably using a formal production system, so I everyone in the

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread gts
Do believe in what people sometimes call 'the force of logic', Jef? Do you believe every rational mind is as a matter of definition compelled to accept the conclusions of sound arguments? I do. If you do too then we have no disagreement. If you disagree then I must think it odd that you try

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread Jef Allbright
On 3/3/07, gts <[EMAIL PROTECTED]> wrote: On Sat, 03 Mar 2007 09:43:29 -0500, Jef Allbright <[EMAIL PROTECTED]> wrote: > In a very general, and thus > widely applicable sense, both induction and deduction are descriptions > of methods of organizing information, performed by a necessarily > subje

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread gts
On Sat, 03 Mar 2007 09:43:29 -0500, Jef Allbright <[EMAIL PROTECTED]> wrote: In a very general, and thus widely applicable sense, both induction and deduction are descriptions of methods of organizing information, performed by a necessarily subjective (limited context) system. You seem to be h

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread Jef Allbright
On 3/3/07, gts <[EMAIL PROTECTED]> wrote: On Fri, 02 Mar 2007 21:09:08 -0500, John Ku <[EMAIL PROTECTED]> wrote: Okay, thanks, I suppose I was coming at this from a different perspective: personally I take Hume's criticism of induction somewhat seriously and Carroll's criticism of deduction n

Re: [singularity] No non-circular argument for deduction?

2007-03-03 Thread gts
On Fri, 02 Mar 2007 21:09:08 -0500, John Ku <[EMAIL PROTECTED]> wrote: The more general lesson is that it's a mistake to think you must answer the skeptic on his own terms. (It usually seems to be a he.) Okay, thanks, I suppose I was coming at this from a different perspective: personally I

Re: [singularity] No non-circular argument for deduction?

2007-03-02 Thread Russell Wallace
The whole thing is silly. Suppose you (I mean "you" in the general sense not you personally) reject logic, and want me to prove it valid. What would you have of me, a logical proof? But if you reject logic, then you need not accept a logical proof. We always have to start somewhere. This stuff is

Re: [singularity] No non-circular argument for deduction?

2007-03-02 Thread John Ku
It looks to me that Russell was pretty much making the same point that I was making. The lesson is not to confuse a rule of inference (Russell's "p, therefore q") with another premise (or proposition) to be justified (including propositions like "p implies q"). If all you had were propositions and

[singularity] No non-circular argument for deduction?

2007-03-02 Thread gts
On Fri, 02 Mar 2007 03:25:58 -0500, John Ku <[EMAIL PROTECTED]> wrote: Skeptics are fond of pointing out that no non-circular argument can be given to support inductive reasoning. That is true, but a century ago, Lewis Carroll showed through his modern parable of Achilles and the Tortoise t