I'd claim that you don't even need prior art for this stuff to not be enforceable patent. If specialist on the field thinks about shooting an arrow to human bei

I'd claim that you don't even need prior art for this stuff to not be enforceable patent. If specialist on the field thinks about shooting an arrow to human being and not injuring him/her, that technical solution they have is pretty obvious. That alone would be grounds to deny the patent at patent office. Unfortunately you can sue with unenforceable patent. It's just that you lose if the other guy has enough money. But in many cases the other guy doesn't have the money.