Scientists have found the most likely way of winning paper-scissors-rock, play scissors.
Statistically most people will play rock, so they play paper to cover your rock, but u have scissors and bam! you win. But i dont see how this works, if ur opponent sucks, they'll probably go rock, and smash ur scissors, so u lose...
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=503337&in_page_id=1770