With all due respect. There was some lashon hara [or motzi shem ra] about a talmid chochom said during the course of the shiur. The shiur is sufficiently interesting without it. 

thank you

Rabbi Rakefet theorizes that Rebbetzin David's doctorate was really about her father Rav Hutner's struggles. He cites zero proof for his assertion. Rebbetzin David is Baruh Hashem alive and well and she can be asked. There is no need to engage in speculation. 

In order to properly understand "who rav hutner was" it is imperative to study his thought [as delineated in the Pachad Yitzchak and the Sefer Zikaron with his name], search for his sources and influences, compare and contrast him to other roshei yeshiva, thinkers and philosophers etc.