I don't believe in ghosts.

I read Project Hail Mary a few weeks ago, and I enjoyed it at the time, and since then it's aged well in my brain.

Some months ago I read some article about how life could be defined as any system of patterns that reproduced itself, or something. The point of that article was about how life could exist anywhere there was energy, e.g. in the sun. If anybody knows what I'm talking about, post a link here...

I suppose that's the premise of Conway's Game of Life.

Anyway -- taking that reproducing pattern thing in mind. Could a house be haunted, with a chill? Maybe if it had the right combination of air currents, you could have a pattern where some cold breeze periodically exists, and creates cycles that would be unexplainable, could that be life? Maybe ghosts are these effective lifeforms that we don't comprehend. Nothing supernatural about them, just not water and carbon etc. And probably not self-aware...