/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: pssecho https://cdn.slidesharecdn.com/profile-photo-pssecho-48x48.jpg?cb=1523540395 Dubito ergo sum. Ubi dubium ibi libertas. Convictions are more dangerous enemies of truth than lies. Belief is the death of intelligence. The only way to get smarter is by playing a smarter opponent.