In musing the question is the title of the post. Two people cannot enter the exact same things without copying each other. But, if one want to know the answer for the same question and the answer is not provided for the former question, you will be forced to use the same title ( i.e. ask the same question).
But the body of the question (the post) will never be the same unless copied from the former post. If copied in this manner it is obviously plagarism.
Therefore can have the same title (ques.) but can't have both the exact same title and body.