I mean important things such as getting your candidate elected, your guilty client to be juried innocent, getting people to buy stuff they don't need and will never need, important things like that. Not meaningless stuff such as getting an if and only if (fortunately, complicated) statement published by proving the statement and its contrapositive (as my doctoral father did once - fortunately, discovered by him when reading the published paper).
At 05:42 PM 7/6/2013, Robert Hansen wrote:
>On Jul 6, 2013, at 7:38 PM, Wayne Bishop <email@example.com> wrote: > > > At 09:34 AM 7/5/2013, Robert Hansen wrote: > > > >> You want to teach something like ... > >> > >> If A then B. Not B therefore Not A. > > > > My point was that in the "real world"; it is far more important > to be persuasive that: If A then B. Not A therefore Not B. And > don't forget: B therefore A. > > > > Wayne > > > > > > > >That's funny. When you said "Not B therefore Not A" I had to take >off my CS hat, and put my math hat back on. For a second I was "Huh?".:) > >I was actually addressing Joe, but what do you mean by "persuasive"? >My premise is that the student has to feel it or they will not >develop the necessary instinct and intuition to use it later. You >meet people often that cannot (and I pretty much mean not at all) >fill in the blanks. If you show them an end result, they cannot even >hypothesize (as you or I might) how you got there. Put simply, you >cannot teach them how to fish. They lack the art (entirely). > >Bob Hansen