Makes perfect sense. It's like in that story about how Bertrand Russell claimed that when you accept a single falsehood, you can prove anything at all. As I recall it, he was then challenged - "let's say 1=0, prove that you're the Pope" and he quickly responded that if 1=0, then after adding 1, you have 2=1, and thus if the Pope and he are 2 people, that means they are 1 person.