Suppose that you read something but there is no indication of who actually wrote it. Could you tell who might have said it just by what was said? Suppose it was a post in this forum from someone who you are familiar with their writing style? I think I can, in some cases. At least I believe the probability is higher that it was written by who I think it was.
there are a couple of people here i can think of who have created second accounts and to me its really obvious who they are.