Loving this so far! This is the first one that's stumping me, I'd love a hint.

(Taking some space here to prevent spoilers from showing up)

I have two theories:

• nonchalance/charming evasiveness - neither of those, nor a combination of them, worked as the key
• prime shows up twice, and eleven is mentioned and is a prime number, but neither of those worked as the key either

When you do the right thing, you will get something that _does_ make sense (and can be used a a key). One of the four things you just described is a step in the right direction.