Steve said, (and very well) "It makes about as much sense as "What you are about to say is nonsense"! "
That is of course the paradox. Because, if you were one of a pair of twin witches, one of whom said, "Which witch is the worst witch?" I would not know which witch was which witch who said, ?'which witch is the worst witch'.
Thereby proving your statement is true, which is nonsense.