And being unable to properly google is pretty good screening. I feel like a programmer who knows when to turn to stackoverflow is a lot more valuable than one that can eventually work it out by brain-power alone but takes three months to do it.

Yes you need to know how to actually program without just using snippets but also yes if you're trying to diff two files in a commandline environment just google the answer - some people will know it by rote but I've got nothing against people that can pickup new tools and learn to use them without much guidance.