How many??

Anyone who has gone to University will be familiar with (and probably cringe at) the word "thesis". They will understand it to mean a lengthy document discussing, or perhaps arguing for or against a certain proposition - time consuming and hard work.  So I could never really understand the story of Martin Luther nailing his "ninety-five theses" to the door of that church in Wittenberg in 1517.  Must have had a really long nail, I thought.  But of course the answer is that a thesis doesn't have to be long - it may simply be a short statement, as were Luther's.  In fact I think history suggests that he got the whole thing on one side of one sheet of paper, and it was this he nailed to the door.