Because I just tried answering to a person. I just wasn't sure about if it worked, and I couldn't really test it, and I don't want to use unlocks... So I suggested my reasoning, and if it wasn't right, somebody else would have corrected me (like they did), or otherwise the person who wanted to know, would test it and tell me it wouldn't work.
Don't attack people for trying to help, but accidently answer wrong. That's the problem..