View Full Version : Philosophy Help!!!

11-05-2003, 07:10 PM
does anyone here take or have taken phil279??
i have a couple questions, i have been trying these all last night and today but cant seem to figue it out!

1. Derive "A" from:
A v B, ~C, ~B v C

i am having trouble with the two disjunctions. I try to get "A" using negation elimination but i cant seem to get it right. PLEASE HELP!!!

2. Show that [(A > B) > A] > A is a theorem.
Ok, first, i couldlnt find the if-then conditional symbol, so i used ">", so > is the symbol for a if-then conditional. I started off this proof by assuming (A > B) > A, which i think is right, after thaty, i just got lost, i am trying to derive "A" under the main scopeline but i am having some major troubles. thx!!

ps, this is all in SD. thx!

11-05-2003, 09:50 PM
come on guys! HELP!!

Gondi Stylez
11-06-2003, 12:52 AM
pm girlracer she helped my buddy with his phil ?'s!!

11-07-2003, 09:24 AM
Originally posted by Impreza
does anyone here take or have taken phil279??

I have taken both PHIL 275 and 279 (Logic I & II), but I forgot 99.9% of it, it's not the kind of stuff one remembers. :(
I'm sure that if I can figure it out, you can too.

Free bump for you.