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Well, you did good then! Though you must have
understood the questions at some fundamental level to be able to draw
diagrams and get the answers right. It means you have good logical
intuition. Some of that stuff is counter-intuitive to people, such as
sufficient and necessary conditions.
If p, then q (p-->q)
If p-->q, and p, then q
If p-->q, and not q, then not
p
p-->q if and only if not p or q
(~pvq)
p is sufficient. q is necessary. Sometimes folks
will treat q as sufficient, or p as necessary, because it feels
right.
Kris
----- Original Message -----
I couldn't understand the
question... had no idea which of the answers were true, drew little diagrams
of bikes and hats, gave up, guessed.. and got them all
right...!
M
On Sun, Dec 21, 2008 at 9:41 PM, Krispen Hartung <info@krispenhartung.com>
wrote:
Speaking
of logic, philosophy, and debating, and as a side-topic, years ago a logic
quiz came out in Time Magazine. I took the liberty to convert that quiz into
a webpage, here:
http://www.krispenhartung.com/logicquiz/
It is a
lot of fun. You can click until you get the right answers, and at the bottom
is a link that I created (not part of the original quiz), which explains why
the answers are correct. All of the answers are based on classic
logic and rules of derivation - modus ponens, modus tolens, rules of
necessary and sufficient conditions, etc People with a back ground in
logic, mathematics, or electrical engineering (like my wife), typically ace
this quiz. My wife aced it without even trying...must have been all
that logic of gates, switches, etc, burned in her brain.
:)
Kris
--
www.markfrancombe.com
http://vimeo.com/user825094
http://uk.youtube.com/user/markfrancombe
http://www.myspace.com/markfrancombe
www.looop.no
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