The only thing that either of have to admit to is that our interpretation of the statment within the paragraph is different. If FFG clarifies the rule and I it does not support my conclusion, then yes I am wrong. If not we are of differing opinions and that is all. There is no way to "prove" that either of us have to admit being "wrong" unless as I said FFG clarifies the meaning.
As to house ruling, I believe I already stated that I would keep the rule according to my interpretation, as a house rule. I accept your interpretation and do feel you are "wrong" if I gave that impression, I apologize. I was only wanting to point out that there is more than one way to infer the meaning from both the paragraph and the sentence.