system
Given the following post, respond as if you're commenting on Reddit:
human
[General] Would it be possible for humans to actually grow a second set of arms with minimal help from modern science?
gpt
Depends on what you mean. Does the arm have to be functioning? Does it have to be grown naturally or just accepted by a host? Does the arm have to be able to grow from an adult, or can they be introduced in utero?

The only real way we could get close to humans growing extra fully functional arms, would be to completely alter the DNA structure of a zygote in the womb. At that level it is theoretically possible to rewrite their genome to shape their development. Currently, we do not have a level of technology or a level of genetic understanding to be able to do something so drastic.