Such qualities can sometimes be unearthed when you ask candidates to deal with a problem they can't know the answer to. In the end the ability to go deep has a

Such qualities can sometimes be unearthed when you ask candidates to deal with a problem they can't know the answer to. In the end the ability to go deep has a lot to do with them being confident in their ability to be able to understand things that are new to them. Most people can go into a deep dive if you force them to do it, but how they conduct themselves while doing it can show you if this is a thing they would do on their own.