Sorry, mis-spoke myself - I meant later in the week. I want to let this sit and then expand it. I intend to turn this into a growing series, related to this i

Sorry, mis-spoke myself - I meant later in the week. I want to let this sit and then expand it. I intend to turn this into a growing series, related to this idea: http://news.ycombinator.com/item?id=672067 http://news.ycombinator.com/item?id=672067 There I thought I'd start with fractions, basically from the ground up, but I think that's wrong. I think I want to engage people first, then "drill down" on demand. The comment about wanting more about the cardinality, the C.H. and related stuff is what I was looking for. Perhaps I can do one a week. Or so.