Facebook lets you combine a lot of search factors. I now know that people who like both Rihanna and "Weird Al" Yankovic like Flo Rida, Adam Sandler, and Will Ferrell. People who like Will Ferrell and They Might Be Giants and Donovan McNabb seem to enjoy the Bible, Harry Potter, and Green Eggs and Ham. Atheists in Nebraska love Nine Inch Nails, Nirvana, and Johnny Cash. Women who like the drink V8 and live in New Jersey like television shows such as Cake Boss, The Ellen DeGeneres Show, and Law & Order: SVU.
Slice and dice but then think twice
No matter what search you perform, Facebook will offer options to hone your results with further refinement, or extend it: If you look for TV shows, you can also see books or photos the same demographic enjoys. It's a researcher's dream!
Or is it?
I found that the same results popped up again and again: A lot of people tell Facebook that they like the Bible, and many women have said that they like Ellen DeGeneres's program. And I suppose it's interesting to know that "Weird Al" Yankovic's fans like authors as diverse as Seuss and Poe, but it's not always especially actionable data.
Every time I thought I'd figured out a search that could maybe lead to unique suggestions that would genuinely interest me, Facebook let me down: Authors liked by my friends who like Dave Barry yielded a single result: Dave Barry. Turns out, that's because just one friend on my list ever clicked to like that particular humorist; though I suspect more like him, my graph results can only ever be as useful as the data my friends--and the rest of Facebook's citizenry--feed into it.
If I broaden that search to Authors liked by people who like Dave Barry, I get results such as David Sedaris, Dave Barry (again), and Douglas Adams--all good results, but not the kind of aha moment I was hoping for. Admittedly, that's precisely the kind of result that would seem most difficult for Facebook to provide, but still, I return to the question: What use is this?