Sincerity of purpose?
If Piers says I am sincere and so is my purpose, what possible refutation can Mr Non-binary make?
None.
Although, i'd love to see him call Piers a liar, and explain on what basis he says so.
Frankly, I think the gender bollocks is going to be short lived. The next generation will reject it as a matter of course.
Transgenderism not so much. There are too many men invested in it.