Is it true that the shortest, compelete sentence is "I am." ?
I've never heard this discussed, but it's hard to find a declarative sentence that beats it.

If you accept imperative sentences as being complete, I'd say "Go!" is tough to beat.
Thanks Avangi!
I've read the "I am." on a website that has "dumb facts on English" and that was one of the facts, and I wasn't sure if that is correct.
So if you are right you really can't trust the internet so much Emotion: wink