But the best response comes from Popeye: "I yam what I yam"
That's what he was saying...that it's not a mark of low intelligence.
People might find this video interesting.
http://www.youtube.com/watch?v=pw4Bhmm22xo
(Hint: the first example seems to be a pre-prepared, memorized commentary....)
I also wish I could find some of the old quotes of Bill Clinton that I once had--ones without the "um" and "uh" parts excised.