Which of the following 5 sentences are true?

a) It is not the case that 2 consecutive sentences are both false.
b) There are fewer false than true sentences.
c) It is not the case that 3 consecutive sentences are all false.
d) It is not the case that 2 consecutive sentences are both true.
e) There are exactly 3 false sentences.

(In reply to Explanation by Federico Kereki)

I understood everything but your last statement: "Since D is true, C must be false, and that implies A and B must also be false."

I don't see how you go directly from D is true means C is false.

No biggie. 

Posted by nikki on 2004-10-12 20:01:16