LG DIAGRAMMING "NOR"

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FlyHigh
Posts: 35
Joined: Tue Jun 09, 2009 12:51 pm

LG DIAGRAMMING "NOR"

Postby FlyHigh » Tue Nov 15, 2011 8:18 pm

I'm pretty comfortable with conditional diagramming but PT58 LG4 Q23 tripped me up today. It was a substitute rule tht I got wrong and I think I got it wrong because I misdiagrammed "nor."

I understand that

If A --> B and C

=

Not B or Not C --> Not A

I get that when drawing contrapositives you negate and switch & --> or and or --> and but what if the rule says nor?

"If X is taken, then neither Y NOR Z can be taken"

Would this be diagrammed as

X --> not Y AND not Z

=

Y OR Z --> not X

Thanks guys!

hobojarpen
Posts: 204
Joined: Wed Apr 06, 2011 12:31 am

Re: LG DIAGRAMMING "NOR"

Postby hobojarpen » Tue Nov 15, 2011 8:25 pm

Yes, you are correct.

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chesterfan1230
Posts: 122
Joined: Thu Jun 02, 2011 11:59 pm

Re: LG DIAGRAMMING "NOR"

Postby chesterfan1230 » Tue Nov 15, 2011 11:45 pm

Perfect




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