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- Newsgroups: sci.logic
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!agate!stanford.edu!CSD-NewsHost.Stanford.EDU!Sunburn.Stanford.EDU!pratt
- From: pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt)
- Subject: Re: Are all crows black? => Logic as an essential
- Message-ID: <1992Nov14.032808.17103@CSD-NewsHost.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Organization: Computer Science Department, Stanford University.
- References: <1duqtpINNjl1@columbia.cs.ubc.ca> <1992Nov12.231756.17396@husc3.harvard.edu> <1e1cnoINN74a@columbia.cs.ubc.ca>
- Date: Sat, 14 Nov 1992 03:28:08 GMT
- Lines: 14
-
- In article <1e1cnoINN74a@columbia.cs.ubc.ca> kean@cs.ubc.ca (Alex Kean) writes:
- >>>> ....
- >>>>too many people graduating as it is without knowing the difference
- >>>>between "All men are mortal/Socrates is a man -> Socrates is mortal" and
- >>>>"All men are mortal/Socrates is mortal -> Socrates is a man".
- >>
- >
- >... the first form of inference as we know is deduction,
- >and the second form is actually know as abduction.
-
- All men are mortal/Madonna is mortal -> Madonna is a man. Guess she
- was abducted.
- --
- Vaughan Pratt A fallacy is worth a thousand steps.
-