Thanks for the response, I've just thought of that single example and couldn't digest it, but it is just me. It's like [guid](http://stackoverflow.com/question

Thanks for the response, I've just thought of that single example and couldn't digest it, but it is just me. It's like [guid](http://stackoverflow.com/questions/2977593/is-it-safe-to-assume-a-guid-will-always-be-unique http://stackoverflow.com/questions/2977593/is-it-safe-to-ass...) as far as I can understand and even bigger that we shouldn't worry.