The dupe checker isn't finding one, so I don't feel quite so bad about asking this. If it is a dupe, please let me know; I'm happy to close it out.
I noticed a comment by random on a certain Meta post. I didn't notice the question ID of the question I was looking at, but I did notice (upon mousing over random's link) a title of "Where is your pony God now?"
I hate to admit this, but I was intrigued, as ponies are one of the memes here. So I opened it in a new tab and discovered that it was just TheTXI's answer for the same question. (Which I upvoted, then downvoted the accepted answer; I think for obvious reasons.)
So I tried a little experiment, and surfed to this link, which I just made up off the top of my head. Naturally, it goes to the same question.
So if the title isn't an intrinsic part of the URL (that is, something used by the system), why is it there? I understand why the system would ignore it -- we change these titles all the time, and it would totally break permalinking. But why is it there at all if it's impotent?