Actually, the issue is whether she consented before she passed out (not whether her clothing was removed).

As you suggest, we don't actually know a lot about what went on, but we do know she was able to flag down a cab and get in it.  Whatever happened after is up for interpretation isn't it?

Reasonable doubt exists in such circumstances.

The big lesson in all this is don't get pissed drunk without having a friend accompany you home.