"Dark matter cannot be used to fudge them because in order for dark matter to predict galaxy rotation it must stay spread out and therefore it cannot be squeezed into little wide binary systems."
https://physicsfromtheedge.blogspot.com/2018/
His blog is an interesting read.
Dark matter is dying. RIP.
(Score: 2) by Gaaark on Tuesday September 25 2018, @09:11PM
This:
"Dark matter is a hypothetical form of matter that is thought to account for approximately 85% of the matter in the universe, and about a quarter of its total energy density. The majority of dark matter is thought to be non-baryonic in nature, possibly being composed of some as-yet undiscovered subatomic particles."
is the dark matter that is suspect.
https://en.m.wikipedia.org/wiki/Dark_matter [wikipedia.org]
Wish-washy, hand-wavy stuff.
No predictive abilities, no scientific method. Just a kludge.