Board Thread:General Discussion/@comment-24934890-20180911200208/@comment-4010415-20181023013742

Glitchee123z wrote:

I would imagine that one of the other characters (in my headcanon it is Nora) who asks him if Ruby is his daughter, and he denies this. And then the theorists would scream "He's just lying so she won't tell Ruby!!!!!!"

Which is why the best way to confirm in-show that he's not Ruby's father is to have a flashback of an interaction solely between Qrow and Summer where they make it explicitly clear that Ruby is Tai's daughter, not Qrow's. Say that Summer hasn't seen Qrow in like a year and Ruby's like a month old, so the theorists can't claim "Well, that just means Summer was hiding the truth from Qrow!!"