system
Given the following post, respond as if you're commenting on Reddit:
human
[Fallout] How people are still phisically intact? How come they don't have a leg sticking out of their asses or have four arms and stuff? Why are they ''normal?''

I mean, there are no mutated-weirdo people other than ghouls. And how in the hell ghouls live that long? Shouldn't they die sooner than normal people due to radiation poisoning?
gpt
Mutations dont really work that way. The few animals seen with extra heads or something are extremely rare cases of animals surviving, adapting, and mutating in irradiated zones for generations. 

The nuclear war left many areas only slightly irradiated. Many humans not in vaults were able to survive by not being near any blast zones, and they knew enough about radiation to avoid heavily irradiated zones, and also possessed the technology (like Rad Away) to stave off its effects. 

Ghouls dont get radiation poisoning either. They are people that have mutated to not only survive, but thrive in irradiated places. They are immune to radiation, and anatomically, no longer human.