yeah - I saw that, but seems to me it only barely meets the "fairly durable" test if you assume cache's and other history keeping mechanisms. I wonder if what

yeah - I saw that, but seems to me it only barely meets the "fairly durable" test if you assume cache's and other history keeping mechanisms. I wonder if what is additionally required is : "someone you respect asks you to write on a topic". In PG's case, his audience might substitute, for others an employer or publisher might be what it takes.