From my readings, I am under the impression that even a provisional patent filing date gives me a one year deadline to file a PCT. During this time, I am free to sell, advertise and market my product. I am curious as to how a patent office determines when a website or public disclosure was first officially made. A lot of websites, forums and articles do not always timestamp the date the post was made. Since a lot of foreign countries are much more stringent on novelty, can this public disclousure hinder my changes of foreign patents?