there are no sources for historical understanding that are neither considered best by historians nor
Why this is right
I think they want us to go cross-eyed while processing this answer, but we certainly have to consider it, since we were looking for "if not best, then neglect". The syntax of the sentence is "There are no X's that are neither Y nor Z." How can we clean that up? If you need to, think of a real world statement that fits that syntax: "There are no Presidents that are neither former military nor college graduates." This would mean, "every President was either former military, a college graduate, or both." No X is neither Y nor Z = Every X is at least one of those two things. No sources are neither best nor neglected, every source is at least one of those two Every source of historical understanding is either considered best, neglected, or both. Hence, we can derive conditionals like this: if a source isn't the best, it's neglected if a source isn't neglected, it's the best When we know that "at least one of Y and Z is true", then that allows us to write conditionals like "If Y is false, then Z must be true" and "If Z is false, then Y must be true". Phew, still alive? We were looking for this missing link: "if historians don't consider it the best, then they will neglect it" That's what this cruel absurdity of an answer choice gave us. if a source isn't the best, it's neglected
Skill tested: Flaw · how this choice captures the argument's function is the move to repeat next time.