[kanelbullar]

He told me finally "We expect Google engineers to be able to solve problems. What if you were a Google engineer, and you had to solve this problem, what would you do?"

At that point - he's talking to you as if he thinks you have the understanding of a child, basically.

There really is no positive recourse available other than to politely end the interview, and chalk up another day of your life (plus N days spent preparing) that you'll never get back.