Oh, I know. I'm sorry I implied that. It can be hard to know what you are looking at if you aren't all that familiar with nubs. People think it is fun to guess and I understand that (because it is) but people can get their hopes up or down in that process. I know I have guessed wrong before and then I felt awful so I try not to guess now unless I am fairly certain. And if I do guess when I am not sure I will normally put a disclaimer.