system
Given the following post, respond as if you're commenting on Reddit:
human
[GoT] What exactly are Stone Men?

I know it's the final stage of Greyscale. But what does it do to the victims exactly? Turn them into lumbering men of rock? Do they hold anything from their former selves?
gpt
They're not rock, it's just the physical affliction that makes their skin look scaly and dead. Like how other infections make the skin pale or bruised, greyscale creates... grey scales on the outer layer of flesh. 

And just like the skin is corrupted, the insides of the infected are changed as well. We know if it gets into the eyes, afflicted are blinded. And other external organs are similarly impaired or ruined. The worst symptoms are most likely caused by a heavy infection of the brain matter itself, destroying or altering functions in the brain like how the infection ruins the rest of the body.  

Like with other brain-altering maladies, the ultimate severity probably varies from person to person. Perhaps some remember flashes or even retain certain higher functions. But for the most part, the loss of personality and other human-like behaviors are lost.