I was just thinking similarly! I would be pretty impressed if the Court had systems where the authoring justice's / clerk's software would insert various diffi

I was just thinking similarly! I would be pretty impressed if the Court had systems where the authoring justice's / clerk's software would insert various difficult-to-detect variations into each copy distributed to the other justices. For example, slight differences in the footnotes / case reference numbers that would be very hard to detect on casual glance. Or even traps like displaced punctuation marks unique to each copy. But somehow I doubt it.