> we can conclude no humans today are descended from female Neanderthals.

that looks worded wrong, strictly speaking. if there's a male neanderthal ancestor, then he very likely has a neanderthal mom or grandma or ... great^N grandma for some N.

Ok yes, you're right. Guess I meant to say: no humans today are descended from someone between a male sapenis-female Neanderthals hybrid.