Plot twist: the doctor is a vampire.
Came here to do the same.
Sometimes the medical benefits suck.
Why can't they accept 'the doctor has blood on their lip'. Sin means ownership and the gender was not specified.
sin læbe = his/her lip
sine læber = his/her lips
deres læber = their lips
Yes, but in English, "their" can be used for plural but also singular when gender is unspecified.
For the purposes of this course I'd just recommend choosing a gender in these situations. English pronouns are pretty complicated already.
Coming from an English professor. If there is no gender specified, then you automatically use the male pronoun. This will probably not work in Duolingo though.
The doctor has blood on HER lip. Tak!
"Don't worry. It's not mine."
Dr. Hannibal Lecter :)
Også: "physician", se for eksempel på Wikipedia: https://en.wikipedia.org/wiki/Physician
Probably not the best place for a vampire to work.