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Logic Chat for Review for Test III: Categorical Proposition Session Start: Sun Apr 06 20:01:27 2003 Session Ident: [20:01] Chat [20:01] Waiting for acknowledgement... Session Close: Sun Apr 06 20:02:07 2003 Session Start: Sun Apr 06 20:49:02 2003 Session [20:49] [20:49] Waiting for acknowledgement... [20:49] Session Ident: #philosophy [20:00] *** Now talking in #philosophy [20:00] -> [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. [20:45] *** Disconnected 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
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