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Topic: A few minutes of sanity
Replies: 6   Last Post: Nov 4, 2013 9:24 PM

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Posts: 1,968
Registered: 12/4/12
Re: A few minutes of sanity
Posted: Nov 4, 2013 11:11 AM
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On 11/4/2013 7:50 AM, Shmuel (Seymour J.) Metz wrote:
> In <l4au0f$125r$1@macpro.inf.ed.ac.uk>, on 10/24/2013
> at 10:49 AM, richard@cogsci.ed.ac.uk (Richard Tobin) said:

>> In article
>> <0.50d8b4d000a73620c6cc.20131022013536BST.871u3ei1lz.fsf@bsb.me.uk>,
>> Ben Bacarisse <ben.usenet@bsb.me.uk> wrote:

>>>> - what's yellow and neither true nor false?
>>>> - what's non-orientable and lives in the sea?

>>> I hope you will follow up after a suitable head-scratching period (I'm
>>> stumped).

>> They are indeed Xorn's Lemon and Moebius Dick.
> WTF? Zorn's Lemma is certainly true in ZFC; shouldn't the answer be
> something that is formally undecidable?

Yes. One would think so. For Zorn's lemma
the question should be something more like

what is sometimes everywhere yellow and sometimes not?

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