Exactly. Thanks for explaining it so clearly.Because you need to consider what's BEHIND the dog too. If the dog has fabulous attributes otherwise, but is "fair", there's no reason to "Throw it out" if the hip production behind it is sound, and if the dog is throwing "Good" and "excellent" itself.
Strauss has a "fair" parent...he OFA'd good. The hips behind him were good too.
I'd be concerned breeding Fair x Fair, but not Fair x Good or Fair x Excellent. Heck, I'd be concerned that Excellent x Excellent could produce hips that are too tight