Yesterday my dear Mother asked me to post some more jokes here, but I don't have any at the moment --- so here's a deep truth: The word "gullible" is not in any dictionary!
Yep, it's not even a real word. (OK, we could get into a philosophical argument about what a "word" is, but not today. Nor will I debate what "is" is.)
Which reminds me of another self-referential question: How do you keep a turkey in suspense?
I'll tell you the answer later ...
(an item related to the infamous "gullible" factoid appears in today's "Marilyn vos Savant" column in Parade magazine; see also MetaJoke (18 Oct 2001), TwoGreatSecrets (9 Nov 2001), MyAffectations (19 Jan 2003), PiratesVersusNinjas (28 Jul 2004), ...)