DeezerShoove » 27 Aug 2022, 7:14 am » wrote: ↑
One last weigh with them separated from each other. Which is not available.
I'm sure this is a sorting problem where logic has pointed out that only certain balls were ever on the heavier side.
In the midst of moving 3 around, keeping track, etc. logic has determined the single ball.
Not a separate weighing.
I'm just lazy.

Well, I only have two balls to weigh. You can mess around with them as you wish.
But if you're talking about marbles, there's 12 of them to figure out. And in that case, stop playing with my balls.