Open Thread: June 2010

To whom it may con­cern:

This thread is for the dis­cus­sion of Less Wrong top­ics that have not ap­peared in re­cent posts. If a dis­cus­sion gets un­wieldy, cel­e­brate by turn­ing it into a top-level post.

(After the crit­i­cal suc­cess of part II, and the strong box office sales of part III in spite of mixed re­views, will part IV fi­nally see the June Open Thread jump the shark?)