 And it was very helpful because the thesis was very helpful. The thesis, when you're doing a thesis, there is no answer. And you go down all these blind alleys. And you have to sort of conclude something from the data you've got. And I did that. And I got out very quickly. And most of my peers who were smarter than I was in the book stuff took four and five years to get a PhD. I got out in 36 months.