I wasn't even arguing about the OP's calico. I was arguing the fact that what you said was incorrect. Low whites can throw high whites. Yes, its a proven tendency. It's been proven that that is what they tend to do when bred. I wasn't saying all low white calico/sugars produce high whites, I was just saying that it's entirely possible and does happen. You made it sound like low white calicos were poor quality animals not worth breeding, which isn't the case.
That may not have been what you meant, thats how I read it though...