Her tirade about omega=+1 is odd because she talks about how it's incredibly anti-science, but doesn't even try to explain what the opposing view is (going so f

Her tirade about omega=+1 is odd because she talks about how it's incredibly anti-science, but doesn't even try to explain what the opposing view is (going so far as to say that she hasn't the foggiest). The first question I would want to know when evaluating the claim that omega=+1 is bad science is to hear the argument for it. From my brief touches with cosmology, omega=+1 comes from measurements that the universe appears to have a flat topology (both from the size of structure in the CMBR and from a variety of other measurements). The flatness problem effectively is a fine-tuning problem that states if omega has slight deviations from +1 (of the order 1e-62) then the universe of today would not be able to sustain galaxies or other large structures. The measurement of _today's_ omega (omega_0) is also very close to +1 (which is what forces the initial condition limit). From that, it was concluded that if we accept the model of an accelerating universe, then the initial condition must be close to +1. Inflation is the proposed physical solution to explain why that is the case. To use the Newton analogy, you are backtracking the path of an arrow to find where it was fired from. To be clear, I personally don't like how hand-wavey cosmology is as a science, but pretending as though modern cosmologists just came up with a random "cult-like" belief that omega=1 is just ludicrous. [The author calls omega 'k'. While omega and k are related (k is the curvature, and can be used to deduce the critical density -- which omega is a fraction of) I'm not sure if that's quite right. But I'm speaking as a senior undergrad here, I might've missed something.] As for the "possible weakness of a sub-argument", you can go to the reddit discussion of this particular post (others have linked it here) and see for yourself. It's quite a bit more than a "possible weakness of a sub-argument". Effectively the analysis is on her entire thesis (that the Bullet-cluster can be explained with modified gravity perfectly fine). The rest of the complains about modern cosmology are sub-arguments to justify why modified gravity should be considered.