I'm reasonably sure Google is familiar with pagination and filtering, seeing as that's pretty much the entire thing their own website does.

I don't see how the same product under a variety of URLs, one for each category it's in, is at all useful to me as a human. It actually rather annoys me when the same page has a whole bunch of URLs: I can't tell which is the "real" one, my address bar frecency gets messed up, visited links don't work correctly, etc.