Re: JSH: Newsgroups mistakes, updated explanation and proof

On Apr 18, 11:20 pm, magi...@xxxxxxxxxxxxxxxxx (Arturo Magidin) wrote:
In article <1176868989.148917.236...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,

Rupert <rupertmccal...@xxxxxxxxx> wrote:
The records of the past 10 years show that you have absolutely no
capacity whatsoever for distinguish sound from unsound arguments,
despite the patient efforts of many people to educate you.

Hmmm...

An argument is valid if the conclusion follows logically from the
premises, invalid otherwise.

An argument is ->sound<- (in a given model) if and only if, in
addition to being valid, the premises are true in the model.

I would say that James's record shows he has no capacity for
distinguishing valid from invalid arguments. While he may also be
incapable of distinguishing sound from unsound arguments, his record
rests mostly on invalid arguments.

--
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"It's not denial. I'm just very selective about what I accept as
reality." --- Calvin ("Calvin and Hobbes" by Bill Watterson)
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Arturo Magidin
magidin-at-member-ams-org

This is true in the sense that James usually starts his arguments with
statements that are true.

.

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