No worries! I think having speculations is what keeps the bp going strong. My only issue was that it seemed like you were stating it as a fact, rather than speculation.
You seem to have a good base for your hypothesis, so you never know. But I might suggest you mention that it is infact, your opinion, rather than proven genetically.
If you breed a black potion to a normal and it cannot reproduce itself (think vanilla cream) then you have an allelic mutation. (I think I used that term correctly)
Anyways, I was not trying to rag on you or anything, just thought you had new information I hadn't seen yet. Wouldn't be the first time :)