Depends where you are or who you are directing it to.. If is just something you are telling a person of no importance or someone you don't want to impress then that would be just perfect if not (Despasito) is right... it should be Verdad, que Juan es alto?.. Btw Juan is a name so it should have a capital J
Answer It means that you want to find the ultimate answer, what I mean is that you want to be te most specific you can and to that you always ask more questions about it until you find the best answer to your question.
