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Re: What is understanding?

Brian,
I believe you have it backwards. It is the contrapositive and
it is
If not A, then not B
Therefore
If B then A.

Actually, it looks like (A->B) <-> (notB->notA). Where the symbol <->
means equivalent.


Sam Held


-----Original Message-----
From: brian whatcott [mailto:inet@INTELLISYS.NET]
Sent: Monday, July 12, 1999 12:37 PM
To: PHYS-L@LISTS.NAU.EDU
Subject: Re: What is understanding?


At 12:11 7/12/99 -0400, Cary Busby wrote:
... Feynman (advice to himself on his last blackboard) was
"What I cannot create, I do not understand." (Phys Today 10 years
ago)

Does it follow that one understands whatever he/she can create?

Cary


There is a name for:
If not A then not B
THEREFORE
if A then B

But I can't call it back. Anyone?

Example:
(If no oxygen, then not alive, therefore: if oxygen, then alive)



brian whatcott <inet@intellisys.net>
Altus OK