I recently listened to https://www.wnycstudios.org/podcasts/radiolab/articles/bit-flip (on BBC Sounds but I can’t see it there now) which includes a story about electronic voting. Short version is one candidate got an impossibly high number of votes and conclusion of investigation was that a cosmic ray had flipped a bit causing the votes for that candidate to be increased by (IIRC) 4096. What if the cosmic ray had flipped a different bit, adding or removing just enough votes to make a difference to who won, but not enough so as to make the results obviously wrong?