Is forking or merging effortful? That is, could you tire yourself out from forking and merging fast enough?
What does the process of forking look like from the outside, between deciding to fork and being two people?
You can fork to anywhere you can stick your finger; can you fork to anywhere you can thread a strand of your hair?
If you tried to make a fork appear inside a hollow object whose internal volume is too small for your body to fit in, but which is made of some substance that is easily breakable (like thin cardboard) or easily shiftable-aside (like cloth), what happens?
Gross question: If there is a small object somehow suspended in midair, or a small object falling though the air next to you and you have really good timing, could you fork such that, when your fork appears, the object is inside your body? Could you do this by accident?
Gross question: Could someone (say, a Joker) fork themselves such that one fork appears already impaled on some nearby object suitable for impalement?
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To whatever extent you know the answers to these questions:
If a person forks and one fork dies, is the situation understood as "one person has become disabled" or "one person has become disabled, and also another person has died"?
If a person forks and one fork commits a crime against the other fork, does the second fork have any legal recourse? Does the answer depend on how long they've been forked? Whether they ever intend to merge?
If someone wanted to fork permanently and live as two separate people, how easy would this be from a bureaucratic standpoint?
Gross question: Presumably, a person can fork, cut off one of their left legs, merge, and have two unharmed legs and a bunch of free meat. Is this the sort of thing that only happens in horrifying wilderness survival situations, or are there cultures, ancient or modern, where it's unremarkable, or practiced outside of dire need?