I've read a lot of opinions and a lot of published pieces about the Bullet Cluster. Please correct me if I'm wrong, but the Bullet Cluster doesn’t prove ΛCDM (it has far too much collision velocity for such a model) so much as as it disproves MOND. The argument seems to be: MOND can describe galaxies pretty well and sort of describe galaxy clusters if you assume that most (>80%) of the mass is in the form of X-ray emitting gas. However, because the gravity lensing appears to follow the visible mass of the bullet cluster, then we can assume that gas doesn’t make up the majority of the mass of the cluster. Is this a fair statement of the argument? Asked in a different way, what does it prove that the gravity lensing follows the visible mass and not the gas?