If we are starting the the chemicals being cases, through external means or the TNO not starting as a TNO, would it be able to sustain enough heat to keep it that way?

So what if there is a temporary heat source (nuke or something) or it originated from closer to the sun?

Shouldn’t the greenhouse effect be trapping whatever does make it though? I thought greenhouse effects could lead to a positive feedback loop scenario

Not Pluto specifically, in fact “TNO like Pluto” was kind of a misspeak because mass and density are flexible. I basically just want a slightly-more-habitable place than the average terrestrial world and work backwards from there. Things like moons of gas giants are explored, but I was thinking how to make things even more remote.

Baldurs Gate 1 and 2 are real time with pause if that helps!

2001: A Space Odyssey touched me in that special place between science, religion, and spirituality.

It was always hungry, and now it was starving. When the first faint glow of dawn crept into the cave, Moon-Watcher saw that his father had died in the night. He did not know that the Old One was his father, for such a relationship was utterly beyond his understanding, but as he looked at the emaciated body he felt dim disquiet that was the ancestor of sadness

In their explorations, they encountered life in many forms, and watched the workings of evolution on a thousand worlds. They saw how often the first faint sparks of intelligence flickered and died in the cosmic night. And because, in all the galaxy, they had found nothing more precious than Mind, they encouraged its dawning everywhere. They became farmers in the fields of stars; they sowed, and sometimes they reaped. And sometimes, dispassionately, they had to weed.