Thread:Project:Support desk/Is it possible to display pages in Category1 AND Category2?

Is it possible to display pages in Category1 AND Category2? For instance, if I had a chocolate category and a peanut butter category, is there a way to display things found in both, like Reeses Peanut Butter Cups? Is there a way to display pages found in A AND B NOT C, like I want to see any pages on the wiki like Reeses Peanut Butter Cups, but don't want anything in the Gummy Category?