Kolins st hk can be duckedYeah, it really is a bit weird.
A bit off topic but are the high-hitting moves in SF the ones that can be ducked, like Alex's f+HP, Gief's and Chun's and Ryu's St.hk? Or do you also have high-hitting moves that can't be ducked? I guess I should know if I'm gonna learn Kolin.
Cammy's st mk looks high hitting but cannot be ducked
I don't think there's a rule