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Re: ZFC and God
Posted:
Jan 22, 2013 3:18 PM
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WM <mueckenh@rz.fh-augsburg.de> writes:
> On 22 Jan., 17:48, "Jesse F. Hughes" <je...@phiwumbda.org> wrote:
>> WM <mueck...@rz.fh-augsburg.de> writes:
>> > On 22 Jan., 15:49, "Jesse F. Hughes" <je...@phiwumbda.org> wrote:
>>
>> > FIS: Finite Initial Segment
>> > FISON: Finite Initial Segment Of Naturals (or indices)
>>
>> >> Well, it's not a "union" in the usual sense, but let's let it pass.
>>
>> > It is a union in that sense that every FISON {1, 2, ..., n+1} added
>> > contains all smaler FISONs {1, 2, ..., n}.
>>
>> We were speaking about the real number d, not the set N.
>
> The set N is required to index the digits of the decimal fractions of
> the real numbers.
>>
>> > This does never change. In particular the set is always finite. If
>> > you add with always doubling frequence, you can add all FISONs in
>> > finite time - given that an "all" is meaningfull here. But at the
>> > end, you think, we cannot follow so quickly, and abracadabra we get
>> > something larger than every FISON? Not in mathematics!
>>
>> Look, you need to offer an actual proof that
>>
>> U_n=1^oo {1,...,n} is finite.
>>
>> I'll give you a hint, by showing you the proof that
>>
>> U_n=1^oo {1,...,n} is infinite.
>
> Unfortunately you don't seem to understand what infinite means, in
> particular that it has two different meanings.
>>
>> Just so you know what a proof looks like.
>>
>> Here's the proof. First, let me be clear what I mean by infinite. I
>> mean that there is no natural k such that |U_n=1^oo {1,...,n}| = k.
>
> That is potential infinity. That proof is not necessary, because the
> set is obviously potentially infinite. No, you shoudl give a proof,
> that there is a larger k than all finite k.
Er, no. When I say that the union is infinite, I do not mean that it
contains an infinite number. It doesn't. I mean that the cardinality
of the set is greater than any finite number.
If you mean something else, then I see no reason to continue the
discussion. You're simply badly confused on what one means when he
says a set is infinite.
I'll snip the rest, because obviously you have shown no contradiction
in ZF, since ZF does not prove that N contains a number bigger than
any natural. You're just confused.
(Hint: if you think otherwise, you could start by citing a published
theorem that ZF proves N contains an element larger than every finite
number. I'll wait for it.)
--
"If your community has been lying about my research hoping I'd never
find a way to prove that with some super dramatic discovery that's
almost yanked out of the clear blue because I am a great discoverer
then yeah, maybe you should worry."--James S. Harris: great discoverer
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