[mjp]

Then there are the millions of kids assigned a sex at birth with which they don't align: 150,000 American teenagers identify as transgender. In a ritual that celebrates only a binary way of thinking about identity, we're leaving a cross-section of the population out

Male sex and female sex is binary. Maleness and femaleness as a gender identity is a continuum. One can be high or low on the continuum. No one needs to be left out.

[Trump20162020]

Maleness and femaleness as a gender identity is a continuum.

Bill Nye, is that you?

I've never heard anyone say 'gender' is anything other than a synonymous word for 'sex' until the last few years.