Flawed logic: Myth or Science?

I found a quote in one of my textbooks attributed to the "scientist" Galen.

"All who drink of this remedy recover in a short time, except those whom it does not help, who all die. Therefore, it is obvious that it fails only in incurable cases."

Good logic.

I challenge us all to come up with some pseudological statements about anything that fancies you.

For example:
A cat always lands on its feet and toast (with jelly or jam or preserves. . you get the picture) always lands jelly side down. Therefore if you put a piece of toast (jelly side up) on the back of a cat and dropped it, the cat and the toast would never hit the ground.

Looking forward to hearing these.