Responded.
Of course, you can't bump into Solo without at least /one/ threat. Even in his condition.
It is an assumption. Only issue with Solo not knowing is that he can usually tell who is what and what is who by scent. Of course, if Eva denied that anything was weird, he might just think his sense of smell was wrong.
Of course, if he just goes "I'm not a guy!" when no one even said anything about that, it'd just be funny.