- #1

- 203

- 0

## Main Question or Discussion Point

http://img222.imageshack.us/i/tautology.png/

I'm not really 100% sure, but it should be:

a) Tautology

b) Tautology Right and left of <-> need to have the same value, right? I think that's the case here.

c) No Tautology, I think. If p, then r and if q then r. contradictory statement? No Tautology then.

d) don't really see a condition here. if p, then p and q... huh? I guess it's not always true. No Tautology.

e) No Tautology. It's not always true.

There must be an easy way to do this! I can't always go through every single statement and check if those 4-5 statements in one equation are always true. Takes too much time and it's too confusing. Is there any other way to do this??

Oh yeah, it's not homework!

I'm not really 100% sure, but it should be:

a) Tautology

b) Tautology Right and left of <-> need to have the same value, right? I think that's the case here.

c) No Tautology, I think. If p, then r and if q then r. contradictory statement? No Tautology then.

d) don't really see a condition here. if p, then p and q... huh? I guess it's not always true. No Tautology.

e) No Tautology. It's not always true.

There must be an easy way to do this! I can't always go through every single statement and check if those 4-5 statements in one equation are always true. Takes too much time and it's too confusing. Is there any other way to do this??

Oh yeah, it's not homework!