What good interview questions are actually trying to discover

What good interview questions are actually trying to discover (Seth Godin)

How long are you willing to keep pushing on a good project until you give up?
How hard is it to get you to change your mind when you're wrong?
How much do you learn from failing?
How long does it take you to learn something new?
How hard is it for you to let someone else take the lead?
How much do you care?
The rest is merely commentary, either that or they're interviewing you for a job that's not as good as you deserve. For those jobs, the only question they're really focusing on is, "will she fit in around here?"