>>13752419They can't exist for any meaningful timeframe in our universe as we know it.
If there is an upper level of universe and ours is imagined by some other consciousness then it can exist, but positing a universe where something can exist to make it possible for it to exist is the same as a little kid during playtime saying "I have a sword of infinite attack," and the next kid saying "I have a shield of infinite defense."
It's in the same category as Roko's Basilisk, drivel that is spawned when people with a higher IQ go through a late "dood deep" phase.