EDGE - Seven is the perfect number. I recall hearing my mother suggest this numerous times over the course of my childhood. The Bible tells her so. Something about end-times prophecy: six is the ‘number of man’ – frequently referred to as the mark of the beast – and seven is the ‘number of eternity’, the perfect number. I don’t know about all that, but I strongly suspect she’s right about the number seven. If only because Drop7 is one of the few perfect games I’ve ever encountered.