I didn't see it mentioned, I think I "epistemic literacy" is the other side of the coin. I see examples of people demanding citations for reasoning that is part of a work, of people just not understanding something, or of only really being able to blindly follow based on province or authority without trying to reconcile back to what they know.
If there is going to be a standard for legibility, there should be one for literacy too - it's especially important when learning from a debate where readers and writers (or sources and sinks) switch roles, to understand how different positions are engaging with each other's arguments, not just how they are making them
If there is going to be a standard for legibility, there should be one for literacy too - it's especially important when learning from a debate where readers and writers (or sources and sinks) switch roles, to understand how different positions are engaging with each other's arguments, not just how they are making them