Can you take programmers seriously if they don't know C?

I know it is an arrogant thought. But I myself have trouble regarding someone in the computing field as knowledgeable or 'good enough' if they do not know C .

C was my first language and is still my favorite. Those who know it understand computers on a far deeper level than those who stick to all high-level languages.

I would go a step farther and say that I wouldn't hire someone to work for me if they were not sufficient in C. Maybe this is just because I am mostly a low-level junkie...

Any one else feel this way? Furthermore, do you know anyone who doesn't know C but is still excellent at coding/computer-science?