> With DM the rationale goes the other way around.
No it doesn't. We have strong priors that the movement of bodies is affected by gravity, and gravity comes from matter. When we see movement we cant' explain given the matter we can see, the most obvious explanation is matter we cannot see for some reason.
No it doesn't. We have strong priors that the movement of bodies is affected by gravity, and gravity comes from matter. When we see movement we cant' explain given the matter we can see, the most obvious explanation is matter we cannot see for some reason.