forum 11: week of 26 March - knowledge and accomplishment
I think that Williamson's argument is more satisfying when applied to accomplishment rather than knowledge. I'm not sure if I'm convinced that persistence could be part of the distinction between knowledge and something lesser like true belief. But classifying accomplishment with respect to persistence seems more plausible. For knowledge, I think it's more likely that the distinction comes earlier - possibly from the cause of the persistence (in other words how the knowledge was acquired).