Ok, so somehow that is causing confusion. I will clarify. The author asked that the reader attempt to find the flaw by inspecting the provided code. The flaw

Ok, so somehow that is causing confusion. I will clarify. The author asked that the reader attempt to find the flaw by inspecting the provided code. The flaw was obvious enough that I was able to find it. The implication is that if it were less obvious, I might not have. I was not attempting to take any credit at all: exactly the opposite.