hmmm, If a sentance needs both a verb and a noun to qualify then it stands to reason the the shortest sentance would have to be two words.
IE:
"Speak friend."
"Enter please."
"Logically speaking."
etc, etc, etc...
But many words are used alone and are perfectally acceptable as complete sentances..
"Stop!", "Enter.", "Hello.", "Goodbye." etc,..
Cheers!
