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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!att!allegra!rfc
- From: rfc@allegra.att.com (Robert F. Casey)
- Subject: Re: Helping to Change Public Education (was Re: Is Math Hard?)
- Message-ID: <1992Nov7.191319.1880@allegra.att.com>
- Organization: AT&T Bell Laboratories, Murray Hill, NJ
- References: <1992Nov5.180244.27364@athena.mit.edu> <Bx9uy1.LB0@mentor.cc.purdue.edu> <1992Nov6.221230.10779@athena.mit.edu>
- Date: Sat, 7 Nov 1992 19:13:19 GMT
- Lines: 28
-
- In article <1992Nov6.221230.10779@athena.mit.edu> jamess@athena.mit.edu (John A Mess) writes:
- >In article <Bx9uy1.LB0@mentor.cc.purdue.edu> hrubin@mentor.cc.purdue.edu (Herman Rubin) writes:
- > Apples and oranges! A high school student is not an Asian graduate
- >student. I certainly hope *any* graduate student is doing more than memor-
- >izing proofs. But you also are wrong about proofs. A truly beautiful
- >proof isn't simply operations. The published proof is kind of a schematic
- >for the initiate to go from a to b concisely. Proofs by contradiction are
- >a marvelous kind. You must know why the contradiction holds. Understanding
- >the spirit of a proof will allow someone to make more headway in rederiving
- >it than simply having memorized the steps once.
-
- I must have missed something somewhere in my math clases, because to me
- proofs don't mean anything to me. It also seemed that everything was
- proven true anyway, so why do it? As if the math teacher was going to
- lie about something? :-)
- Though once the teacher was going to "prove that 2=3"
- Proof:
- prove that 2=3
- ok a=b
- ax=bx
- ok, now set x=0
- now you can set a=2 and b=3 and have it work
- so, 2=3
-
- But you can't divide by zero. I ask "where did you divide? All I
- see is multiplying by zeros?"
- Teacher said something unclear, I thought "screw it, proofs are BS anyway".
- This was in freshmen year in high school.
-