I would agree that people are generally assigned “sex” and “gender” at birth, I just don’t understand why it seems they’re conflated among queer spaces when discussing “Assigned Male At Birth”+“Assigned Gender At Birth” when I feel like it should be “Assigned Boy At Birth”+“Assigned Gender At Birth” and “Assigned Male At Birth”+“Assigned Sex At Birth.” If we’re in agreement that the OP is an error, I guess I’m just surprised to see it in this space.