from that link: There are tons of wacky Internet theories on what that “…picking your feet in Poughkeepsie.” line really means. The most sane and rational meaning is that the line is simple a confusion/interrogation tactic where someone utters accusatory nonsense like that to confuse the person they are interrogating so that when they ask a real question, their defenses will be down and they will utter “the truth” or confess to a crime That's too complicated for me
An English teacher was explaining the principle of the double negative to students. "So in summary, in various languages, a double negative is an emphatic negative, whereas inn English, a double negative is properly a positive. Interestingly, in no language is there a double positive meaning a negative." "Yeah, right", replied a student.