This goal has the following fine print specified by oulfis:
A text is 'done' when I have written down the main arguments about it from at least FOUR secondary works. YES, THAT IS A LOT. THAT IS HOW MUCH IT TAKES. Can get partial credit, .25 points per secondary work. A source 'counts' when I have made at least one flashcard on it, as denoted in the file with #. No credit is given for sources beyond the first four: the goal here is *breadth*.