Wiktionary
muddleheadedness
n. 1 The state of being muddle-headed 2 mental confusion or foolishness
Usage examples of "muddleheadedness".
Had he, perhaps, been his own muddleheadedness that had put him on the wrong road?
To my mind putting Maureen in charge of anything was asking for trouble, but in the way of certain Christians she regarded her muddleheadedness as God-given, laughed forbearingly over a hopeless mass of papers which someone else would have to sort out, and further burnished the ready and rather mad smile which she bestowed on the world at large.