File this under "Bug or Feature?", but Cog Sci got this migration from Economics. Economics is closed. Now if you click the "migrated from" link on Cog Sci, you get the actual question on Economics in full, as if the site weren't closed. If you go to any other page on Economics, you're redirected to the "closed" page on Area 51, which is normally what links to closed sites give you.
?noredirect=1 query string to get to other questions on closed sites works, but it doesn't work for the non-question pages like the FAQ, log in, ect. This struck me as a possible bug, definitely weird.