Hi everyone,(adsbygoogle = window.adsbygoogle || []).push({});

I really need help proving a theorem for logic HW. I am allowed to use all the standard derivations in Sentential Logic.

Also I do not know how to enter in the symbols so I will use ">" to signify conditional in the problem below.

Instructions: Show that each of the following is a theorem in SD by constructing a derivation.

1:) ~A>((B&A)>C)

2:) (AvB)>(BvA)

If someone could help me out I would really appreciate it as I am so lost right now.

Thanks,

-Tony

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: SD Theorems Logic HW due Please help

**Physics Forums | Science Articles, Homework Help, Discussion**