Nicholas Matte lectures at the University of Toronto. In the video below he asserts that "It is not correct that there is such a thing as biological sex". He then announces his intention to break down a "cisnormative culture" which he defines as the idea that "there is such a thing as male and female, that they connect to being a girl or a boy or a man or a woman..."
Crazy, right? But don't write him off. His views fit in with the state ideology, so they'll find their way onto your local school curriculum regardless of how outlandish they seem.
Remember, the ultimate aim of liberalism is for individuals to be self-defining. We don't get to define our biological sex, so a liberal will therefore be committed to making the fact of being a man or a woman not matter. They can do this either by aiming for sex neutral outcomes or, more radically, by denying the existence of biological sex. Liberals will be tempted to take the view that being male or female is merely a social construct designed to privilege some people and oppress others. They will want us to overcome the "gender binary".