Design Knowledge in the chart and knowledge in the head One of the many insights from Don Norman's great design
Aggregation An offer for New York Times Business reporters Reading the New York Times's coverage of the unemployment report
Blogs Applying numbersense to a Bloomberg report Eric P. asked me to comment on his recent post via twitter.
Bias All else is equal except that one is more equal than the other The mis-use of "all else being equal" in statistics