From Maya Forstater’s article, “On Gender-critical disputes.”

Helen Joyce comes up with really good allegories and mental models at the rate of about one a week. But the one that I keep coming back to is one she told me the first time I met her, when I was still scrambling to keep my job at CGD, and trying to understand how it was that my smart and normally convivial colleagues had succumbed to repeating and enforcing irrational, circular nonsense.

1=0

Helen (a mathematician by training) said that pretending that human beings can change sex is like saying 1=0, and that the rules and laws we use for sense-making and decision-making are like a series of interconnected equations. When the 1=0 untruth proliferates through them it breaks things: single-sex becomes mixed-sex, fair becomes unfair, truth becomes lie. It works like kryptonite on safeguards, and causes organisations to operate in direct opposition to their purpose. People who need or want to remain inside those institutions create layers of argument (which may be impenetrable even to themselves) in order to protect the untruth and avoid being cast out.