$1$ : It means "there exists something"
$0$ : It doesnt mean "there exists nothing", instead it means "there exist something but that is nothing"
My accept policy is to accept the first completely correct answer. Acception is final and will never be changed. If no complete answer is available after a certain time, I accept partial answers.
I try to answer at least two times more than the number of questions that I ask because my questions are usually two times more difficult than the questions that I am able to answer.
I try to upvote all constructive answers to my questions and all nice questions/answers. I try to avoid downvoting and rather I use diplomatic ways to overcome the problems. All intentionally problematic questions or answers will be downvoted.
I respect all persons who are willingly to help others. I show immediately in the comments that I dislike arrogant types.