" The pre-meal ritual involved flashing the plate with your rectangle. It is not entirely clear why this is done. At first, I assumed that they flashed everything they were unsure about. In this case, having your meal prepared entirely by a neighboring tribe can have its risks. My working theory is that, by chronicling his every meal, a tribesman can identify what exactly did him in – should illness arise. "

― Marcel M. du Plessis , The Bright Report (Bright Report, #1)