(Playing devil's advocate with this question.)
In Shmot 21:31, Rashi says:
לפי שנאמר והמית איש או אשה, יכול אינו חיב אלא על הגדולים, תלמוד לומר או בן יגח וגו' , לחייב על הקטנים כגדולים:
The Torah has to specify that it's both male and female, adult and child, that you're liable for goring.
But what about an androgynous (person with both male and female parts)? If my ox gores them, am i liable?
The case of a tumtum seems clear that you'd be liable, because there the person is either definitely male or definitely female, we just aren't sure which.
And if the answer is an obvious yes, please provide sources. ;)