> Don't know why you're downvoted since you're absolutely correct. OP might be down voted because, even though the answer might be technically correct, it stil

> Don't know why you're downvoted since you're absolutely correct. OP might be down voted because, even though the answer might be technically correct, it still completely fails to explain the concept (i.e., it's a useless explanation) and does so with a hint of arrogance and demeaning to readers. Yours too, by the way. It's like someone asks what is temperature and some smartass answers it's a scalar quantity that's mapped from a physical state into a semi-infinite continuous set. Great to know.