Paul, Your syllogism uses the wrong syntax......I thought this might be obvious but appearently it was not obvious enouph....? Yours: 1. Dogs have four legs. 2. My cat has four legs. 3. Therefore my cat is a dog. .....I did not say if four legs, then dog,(yours) ..............I said if dog, then four legs(mine)...... This is the very reason you can't grasp the difference between logically valid and invalid A-cen v Geo-cen arguments.... You are always looking at the wrong things! Paul Deema <paul_deema@xxxxxxxxxxx> wrote: Allen D 1. Dogs have four legs. 2. My cat has four legs. 3. Therefore my cat is a dog. Paul D --------------------------------- Sick of deleting your inbox? Yahoo!7 Mail has free unlimited storage. Get it now.