Dumbest Sentence Ever Written

I am enjoying Tom Clancey’s “Teeth of the Tiger,” wherein this brilliant man posits that a future terrorist attack upon the USA may be undertaken by – hold on to your seats – Arab Muslims. (What?):

Unfortunately, in the middle of this otherwise entertaining and insightful novel is the dumbest sentence ever penned in English.  To wit:

“The sun rose promptly at dawn.”

Um, guy.  The, uh, sun can’t be late for dawn.  Because the rising of the sun … IS DAWN, you dolt!  Oh well, it’s fun nonetheless.