The frequent references to Hadd keep reminding me of this sentence parsing problem that my Year 12 (or was it 11?) English teacher gave us all those years ago. You have to punctuate the following to form a semantically correct sentence (or sentences):
had had had had had had had had had had had had
I couldn't get it at the time and I'm not even sure if he ever gave us the answer. And...I think the original might have only involved seven "hads". But I can now think of an answer that works for all those hads, and I think that it is likely there is more than one answer.
I never really understood the concept, to be honest. But a couple of us came across one recently that, now I understand it, allowed me to nut out the had one. The recent one is:
buffalo buffalo buffalo buffalo buffalo buffalo buffalo
Let me know if you can do either of them. Answers in a day or two.