> If someone says “I’d like to start by taking ten minutes alone in another room and think it out first”, will they get hired? Probably not. It’s not the expected performance even if the solution is fine.

When interviewing I always start with a discussion about the problem. On the whiteboard. I'm explicit with the candidate that this is totally expected.

I'm actually measuring something perhaps more important than the code that will get written later: can this person formulate a plan and have a technical discussion.