Logic Chat for Review for Test III:  Categorical Proposition

Session Start: Sun Apr 06 20:01:27 2003

Session Ident:

[20:01] Chat

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Session Close: Sun Apr 06 20:02:07 2003

Session Start: Sun Apr 06 20:49:02 2003

Session

[20:49]

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[20:49]

Session Ident: #philosophy

[20:00] *** Now talking in #philosophy

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[20:01] *** larchie: you're not channel operator

[20:02] <larchie> The Chat is Open

[20:04] <larchie> The Logic Chat is open for discussion

[20:07] <larchie> The Logic Chat is open ...

[20:14] <larchie> The Logic Chat is open ...

[20:17] *** thermido has joined #philosophy

[20:18] <larchie> Hi, do you have any question?

[20:19] <thermido> not yet, let me look at the practice test

[20:20] <larchie> OK

[20:21] <thermido> contrary and contradictory are the same, right?

[20:22] <larchie> Not at all--contrary is A <---> E

[20:22] <larchie> Contradictory is across the midde of the Square of Opposition

[20:22] <thermido> oh, thats right. sorry.

[20:24] <larchie> There's a picture in the syllabus that looks like the diagram at ...

[20:24] <larchie> http://philosophy.lander.edu/logic/square_syllabus.html

[20:25] <thermido> just to check: converting uses the "right hand," and switches the pred. and subject; it preserves truth value for the E and I.

[20:26] <larchie> Right, and for A and O you will get an U --regardless.

[20:26] <thermido> ok, i got all of the stuff for part 3 of the test.

[20:27] <larchie> Good, be sure to do the practice quizzes at ...

[20:27] <larchie> http://philosophy.lander.edu/logic/quizzes.html

[20:27] <larchie> They're just like the in-class quizzes and the test, itself.

[20:30] <thermido> I'm trying to check my info for the further immediate inferences... obversion switches the pred. and subj. preserves tv for E&I

[20:31] <larchie> You just gave that definition for conversion--check above.

[20:31] <thermido> obversion changes the quality, i.e. all s is p = no s is p, and puts "non" in front of the predicate

[20:31] <thermido> oh, sorry i mis-typed. I really did mean conversion.

[20:32] <larchie> OK

[20:33] <larchie> The complete table for conversion, obversion, and contraposition is ...

[20:33] <larchie> given at ...

[20:33] <larchie> http://philosophy.lander.edu/logic/further.html

[20:33] <thermido> that might help. thanks.

[20:33] <larchie> Once you have reviewed the summary definitions, you might ...

[20:33] <larchie> want to write out every possibility.

[20:34] <larchie> Especially, the obversion of the I proposition--the most missed inference.

[20:39] <larchie> I'm surprised that there are not more persons in the chat. Maybe, they're studying on their own.

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Session Close: Sun Apr 06 20:45:36 2003

Session Start: Sun Apr 06 20:47:59 2003

Session Ident: #philosophy

[20:47] *** Now talking in #philosophy

[20:48] <larchie> I'm back -- the connection was lost for some reason. I'll try to secure

[20:48] <larchie> the channel with mIRC.

[20:50] <larchie> The Logic Chat is open ...

[20:51] <larchie> The Logic Chat is open ...

[20:55] <larchie> The Logic Chat is open ...

[20:57] <larchie> The Chat will close in five minutes.

[21:01] *** Disconnected

Session Close: Sun Apr 06 21:01:58 2003