system
Given the following post, respond as if you're commenting on Reddit:
human
[general fantasy] If two demigods breed, do they have a chance at birthing a full god?

Demigods are usually the result of a god having a child with a mortal. The resulting child being half divine and half mortal.

If two demigods breed and all the DNA lines up just right, could the child be fully divine DNA and thus a full god?
gpt
Generally-speaking, no, because it's not a matter of genetics; it's a matter of "divinity". That's more often than not a quality that transcends any question of flesh or construction, and has more to do with nature, or essence. Once the quality of divinity has been mixed with mortality, it's not fully divine anymore, and becomes something different than what the godly parent possesses. 

I suppose the best analogy might be to liquids. Say divinity is like fruit juice. If you mix two types of juice (two gods reproduce), what you get afterwards is different than either original, but it's still juice (i.e., a full god).

But when you mix some grape juice with *saltwater*, say (god breeding with a mortal), then what you've got at the far end is not precisely juice, and it's not precisely saltwater either. And no amount of mixing "salt-juice" is ever going to get you "pure juice" again.