[jdmichal]

> PS: As soon as someone says "i don't know" you need to stop and realize they would spend a few minutes on google. Spending more time on the topic at this point is pointless.

Or, give them the answer and see what they can do with the information. IE, pretend that they DID lookup the answer and go from there. Did they grasp the concept? Could they make logical inferences from that new concept? If they can't do it when you tell them the answer, why would you think they could if Google told them it instead?

[Retric]

Googling gives someone time not just an answer. Sure, for trivia an answer is all you need, but trivia is a waste of interview time. On the other hand if someone looks up a formula they can spend 5 minutes actually understanding it which feels like an eternity in an interview.

Remember the context is the Job not the interview. On the job, having not done something for 3 years is a minimal setback for most people as the retraining time is almost meaningless. In an interview that 'highly' skilled person is going to take a long time to get back up to speed.