Well, a fellow here had the unfortunate situation of his a doppelganger of his much beloved and long dead friend arriving. As you can imagine, it was rather painful. Close but not nearly close enough. But I remembered that when a similar thing happened to me, the doppelganger immediately went missing and not long after that, the right version appeared.

I told this to the fellow and sure enough, he wanted to give it a try. He killed the copy of his friend, with some help. Ah... but despite what he claimed, his face showed his pain clearly. Even though they weren't the same, it was close enough that it left a mark.