Contributions should be relevant, sound, in good taste, objective, coherent, concise, nonrepetitious.
Diversity is welcome.
The quality of contributions and self-control exhibited by contributors has dropped off radically. Various complaints have been received recently that I have suddenly become far too generous in including too much irrelevant, unsound, incoherent, and otherwise marginal material. And please excuse the slowdown. Please don't expect me to do it again. The certification issue is not generating much enthusiasm either way.