> it still has lots of assumptions and gaps that are not tested Agreed. I didn't mean to imply that dark matter is a solved problem. In fact, I'm pretty sure I

> it still has lots of assumptions and gaps that are not tested Agreed. I didn't mean to imply that dark matter is a solved problem. In fact, I'm pretty sure I implied the exact opposite when I said it "doesn't necessarily make them wrong." > Dark matter may be popular but only because it is currently the best theory that fits Exactly. That's a pretty good reason to favor one theory over another.