I understand that 'roughness' in the universe is explained by inflation, because quantum fluctuations in density get separated farther than their Hubble sphere--far than any influence (distance greater than speed of light) between them. Some areas by quantum chance have higher density and can then aggregate to form matter and ultimately stars and galaxies and so on. At least, that's my general understanding (though I'm not expert in this area). But this explanation, of 'no influence' seems incomplete. If particles of whatever type are separated farther than they can affect each other (based on distance vs speed of light), is there not still all sorts of entanglement that was established at the big bang and hence can affect particles no matter how far apart they are? That is, once an entangled particle interacts with anything else, which should be a sort of 'measurement', then its partners, in or out of their Hubble spheres, will also instantly be affected and take on a definite state. I must b misunderstanding something! Of course, if entanglement means complementarity then this would lead to a sort of symmetric roughness pattern, and this might be consistent with the symmetric (Gaussian) density distribution of the CMB. So what am I misunderstanding?