The Last Thing On My Mind

For about two days now, I have been trying to figure out what is the last thing on my mind. It's not an easy task because you have to think of all the first things on your mind, then the middle things on you mind, and then there's a lot of false hopes raised as youjust think you've thought of it and then suddenly you're thinking of something else. For a while I thought it was "my sister's big toe", but then "ball peen hammer" occurred to me. I was about ready to write that down when "foodelee-doodelee" struck me for some reason, and then in quick sucession "caraway seed", "twelve feet", and "dog pie". But then I realized how stupid I had been. The last thing on my mind was always "The last thing on my mind". Every time I thought of something, I would check to see if it was "the last thing on my mind." So no matter what I thought of, it was always followed with, "the last thing on my mind." Therefore, according to the law of infinite regression which says it is illegal for anything to repeat infinitely, the last thing on my mind is "the last thing on my mind."