The map
Rules on one branch fail for the same underlying reason, which is why they hang together. Inside a branch the order is Vietnamese interference first, so what costs you marks sits at the front. A hollow dot is a lesson no human has read.
11 not started
The bar under each rule is your place on the seven-step review ladder: hollow means you have never answered it, filled means you have climbed that far, red means it is due now, all seven means you beat it. Green is a rule you told us you already know. A dashed line means you skipped it.
11 rules
