/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: MuhammadAbdillah1 https://cdn.slidesharecdn.com/profile-photo-MuhammadAbdillah1-48x48.jpg?cb=1523011548 ���To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.��� (Confucius)