system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Was Doomsday once a Kryptonian human? Do we have any information on who his parents were? Can his condition be "reversed"?

I only know that he was experimented on as a baby to be the perfect organism to survive. So I'm guessing prior to all that he would've just been just like any other Kryptonian? Does he then have some kind of intelligence to speak or do things like a civilized being if taught to do so?

Lastly, can he be taken back to his form BEFORE he became the monstrosity? Has there been any attempts to uncover his past? Since he and Superman were from the same planet I'd have thought maybe Clark showed some interest in learning more about him. Doomsday always seemed pretty tragic character to me.
gpt
Depends on the continuity.

But in the original comic, no. He was a genetically engineered monstrosity, a completely artificial life form created to be perfect, destroyed and cloned over and over again until he escaped and began the rampage that ended with Superman dead.

In the post-Flashpoint continuity, Doomsday was actually a sort of fungus/infection, capable of spreading. While there might have been a regular person there at some point, by the time that Superman finally defeated Doomsday, there was nothing left but the Doomsday virus itself. Superman got infected, but somehow a trip through a black hole separated the infection from him.