elite4koga t1_iu8saa5 wrote

This answer is making some unstated assumptions about theoretical dark matter. I think for clarity it would be helpful to write out those assumptions here. Particle nature, certain mass range etc.

Dark matter has never been directly observed, to my knowledge there isn't even strong evidence of where its located. So the certainty of statements like "dark matter has no coherent motion" I think needs some caveats.