"It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt." I believed this is attributable to Mark Twain, and said so publicly only to be gleefully told by a colleague afterwards "Mark Twain didn't say that, Lincoln did!" Should I have been embarrassed? I recall, I think, later finding it attributed to MT in a little book called "The Wit and Wisdom of Mark Twain," but without any citation. Can anyone clear this up for me? Thanks. David W. Thorne Seattle, WA