hardbody:
I have tons of these brain wrackers in a compendium of Logic texts, although it is in soft copy. Any interested NLander can send an email and I will send a copy to them. Although I must confess I never read beyond the first few pages. Fortunately I am gainfully employed and so would not b needing those question and answer sessions. Before I forget, Accenture embarrassed me with one of those questions way back in time, I felt very stupid when I got home and realized I goofed.