I tried to merge the tag check-my-answer into check-my-proof, because insofar as these tags mean anything (which is not really the case), it's the same thing: “I've solved a problem, here's how, is this right?” — and this is science, so the how always involves a proof.
After clicking the “Perform Merge” button on the merge confirmation screen, I was redirected to an Oops page: “Oops! Something Bad Happened!”.