" However, we have very good evidence that the substantial majority of dark matter is something exotic, rather than ordinary matter that we can't see. This evidence comes from two independent sources -- the abundance of light elements from primordial nucleosynthesis, and temperature anisotropies in the cosmic microwave background. "--Sean Carroll
Cosmology Primer: The Dark Universe
IMO this quote bears repeating because of how misleading his statement actually is. A little "translation" is in order.
What Sean means by the first "line of evidence" is that their creation mythos won't work correctly without magic matter fudge factors. If only ordinary matter were involved in the magical bang creation mythos, it would not produce elements in various percentages that are consistent with observation. Since the dogma supersedes all actual "observation", the dogma is instead presented as "evidence" to support their claims anyway!
In short their theory is pathetically and hopelessly broken, and incapable of predicting anything related to nucleosythesis accurately without exotic fudge factor and never been seen on Earth forms of matter and energy.
The second so called "line of evidence" is again based upon *yet another* affirming the consequent fallacy and an appeal to *dogma* not actual observation. Dark matter has never been shown to produce any "temperature anisotropies" in any experiment on Earth. Since no cause effect relationships can be verified his claim is again nothing but another appeal to the dogma of the theory and not to an actual *observation* with demonstrated cause/effect relationships.
The whole claim of "evidence" is one gigantic circular feedback loop that amounts to an appeal to the dogma of the theory itself. They claimed that their galaxy mass estimation models were "right" when they were not right. They "made up for it" with magical and exotic forms of matter. When their show got "busted" in terms of their botched mass estimates and their negative lab results, they just sweep it all under the carpet, and repeat the same magical mantras from the same magical creation mythos, while still claiming to have "evidence" to support their nonsense!
Nevermind those failures in the lab, just point at the sky and appeal to the dogma anyway!
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