The power of "POSITIVE NO"

In a previous post about the word "NO" Power of NO , I write about the negative affects that the word "no" can have.
Positve "NO" on the other hand is a very important word to not only use but to comprehend. Understanding "no" in a positive way will help a child to gain a feeling of trust, self learning and self worth.
By simply asking a child if the sky is purple or is that flower blue (when its red),
will quickly teach a child that "NO" is a good word to use, and can actually make you feel good about yourself, such as "Are you sad today"? A required answer would be of course "No, I'm happy today". The word "NO" in this case is very uplifting and positive.
If the child knows the word as a negative, the question "Are you sad today"? Would be responded with a firm "NO", with nothing else added to it. If the same child was sad, and knew that you were looking for an answer such as "NO", that child may respond something like "No I'm not sad", "Not" being another negative. That same child may also respond with a firm "YES" and nothing else.
A child that is sad and uses positives to talk, will more than likely respond with "Yes I am sad today".