my post is made of the same letters as yours. theoretically, i could vary your post into mine, step by step, by adding or changing a letter every step. it might take a REALLY long time, but it wouldn't be impossible.
I think what Mr Jack was outlining can be explained with your analogy, if each "intermediate" post has to read correctly (proper grammar etc.). So there may be not be a string of single character changes that can change your post into his. At least that's how I understand it.
An interesting idea. I can't see how it could be true though.
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