If a unicorn farted to create rainbows, my ability to see rainbows could still be based on their refracting of light. Both could be true simultaneously and not contradict each other.

If the criminal is honest and wants to admit their crime, the Twins scenario will result in one denying the crime and one admitting it, correctly. If you imprison them both it would be unjust for one of them. If you imprison one of them and the other goes free, no injustice is done. If one human did the shooting, stepped into the teleporter, now two humans are honestly admitting to it, what do you do? If you imprison only one of them - one shooter, one person in prison - is that justice? If so, which one do you imprison and why? The other one experiences comitting a shooting and admitting to it and walking free unpunished, that doesn't seem right. If you imprison them both, then you must at some level agree they are both the same person who pulled the trigger, yes? If you don't agree they are both the same person who pulled the trigger and both need punishing, which one isn't and what's the difference about that one?