Mitwell's answer to the accusations is that his dissertation (number two) is simply sperm:

Oleg Lvivich replied that no, he did not steal, but simply accidentally remembered the strangers. This is the peculiarity of my memory, Oleg Lvivich Mitwell said. I have read a lot of other people’s dissertations on the topic that interests me, and a lot has been left in my head. And from there it came on paper - in this order. What can I do?"

From the post of S. Parchomenko, "Echo of Moscow".