Definition of "knuckleheadedness" []

• The state or condition of being knuckleheaded; foolishness or ineptitude. (noun)

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• "The reason for these reminders of my knuckleheadedness is a little ditty I wrote about a south Denver woman who found herself flying at 80 mph down West Yale Avenue after the floor mat of her 2001 Nissan Maxima grabbed and trapped her car's accelerator."
• "It's Emmy nominations day -- that one day a year when the Academy of Television Arts & Sciences unveils its candidates for the industry's highest honor, and rabid fans of such shows as "Lost," "American Idol," "Real Time With Bill Maher" and "Two and a Half Men" set aside their differences and join hands to celebrate their shared view on the general knuckleheadedness of the academy in its choices."
• "On Wikipedia every new contribution goes through a series of checks, which attempt to weed out fraud, self-interest, simple knuckleheadedness, and pranks."