[Hill of Tara]

"Because we are still learning a whole lot about how digestion works. It is not even close to being a completed science. It's all theory (theory not being a bad thing or just *mere speculation*). Theory is the endpoint of a scientific hypothesis, not *fact*.

Evolution is about as well understood as digestion is."

I would say that the way digestive system and how it functions, while we may not know EVERYTHING baout it, we pretty much understand the basics of how it works. On the other hand, we dont know if evolution actually happened, though science tells us it did. But we do know that people digest food.

[CarolinaGuitarman]

"I would say that the way digestive system and how it functions, while we may not know EVERYTHING baout it, we pretty much understand the basics of how it works."

In a lot of ways maybe, but there is still a lot we don't know. That is why how digestion works is a theory. And since we will never know EVERYTHING about it, it will always be a theory.

"On the other hand, we dont know if evolution actually happened, though science tells us it did. But we do know that people digest food."

Not only do we know evolution happened, we can observe it happening today. We know evolution happened, and we have a pretty good idea how it happened too.