Playing two montages simultaneously?

Development Character & Animation
10

My two cents from this post:

  1. “Multiple slots can’t be active simultaneously if they’re from the same slot group”
  2. “More than one slots can’t be active at the same time”

Which one of those is true?

If 2 is true, then 1 is superfluous.
Else if 1 is true, then 2 is not.
Else uncharted_territory?

From my own tests, using ShowDebug ANIMATION I found that multiple slots of different slot groups were active (they were shown in green so I suppose this means “active”).
Therefore it seems to me more likely (and more logical) that 1 is true.