[tasty_freeze]

> you need to be able to hold your own in an argument

Then you'll hire a bunch people who like arguing about things they aren't qualified to argue about. I'd much rather have a coworker who admits what they don't know and is willing to learn about it rather than someone who is willing to vigorously argue in support of an arbitrary position.

[DoofusOfDeath]

Great point, but I could imagine this being a test for many different traits. One might be that the interviewee would be entertaining to argue with. It's anyone's guess what really motivated the interview topic.