Thanks for your suggestion. I don't know if adding an additional gender option to the Sanity Score test would be possible or not. However, as a person who has struggled with gender dysphoria all of my life (while living my entire life as a male) I would find it interesting to take the test first as a male & then as, perhaps, non-binary or whatever the third gender option might be.
I've taken a couple of small gender-identity-related tests recently. (There are links to them in threads in the LGBTQ+ & sexual & gender issues forums here on PC.) And the results always place me in the "undifferentiated" mildly feminine category (which is somewhat surprising since I don't think I come across to people as effeminate... more quiet & reserved.) But, anyway, it would be interesting to see if my Sanity Score test results would be different if I identified myself as non-binary rather than male.