You could, but I doubt many would use it. I agree with the above, that people compartmentalize, and they see Facebook as a place to see pictures of their frien

You could, but I doubt many would use it. I agree with the above, that people compartmentalize, and they see Facebook as a place to see pictures of their friends and play games. They see Google as place to look up information. There already is a very good search on Facebook and the fact that it is powered by Bing is unknown and irrelevant to 95% of the people. However it hasn't made a dent in search, so you have to seriously ask why that is. If you believe in Facebook as a search engine (I don't), the only real answer is because it's not powered by Likes. But to believe that, you have to believe that people have a major affinity for Likes, enough to throw away their old search habits in favor of it.