/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: Labelled https://cdn.slidesharecdn.com/profile-photo-Labelled-48x48.jpg?cb=1522995085 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -- Douglas Adams