And yet Carly Fiorina has an MA in History, and look at what she did to Hewlett Packard.

Since when do degrees imply knowledge? Most degrees are only tangentially related to actual education.

Judging by her campaign and how she ran HP, I don't see a sign she's critically open in the way you need to learn from history.

Personally, I'd say knowledge of history is a very, very thin bullshit detector. It simply allows you to see more patterns; not how to evaluate them when they compose.