Hi Sebastiano, hm.. I don't know, I didn't have chance to think about it, I just found it attractive and easy to do Kendall's experiment, and post the results. Despite the obviousness of the result, something tells me that it's not that easy, but I'm not in the most convenient moment to carry out such a delicate process as thinking -;) I still don't like the idea of throwing data, even if some of list members believe it is not data but junk. That requires a thorough thinking and comprehensive testing: sounds like a project for someone to do. So, no - I would not take the result of this test as a green light to run all data sets through aniso-truncation server, no. What if you just start trying blindly removing reflections one by one and see if removing each one decreases the R, and actually remove one if and only if it does decrease R? That would be a way to come up with very robust and unjustifiable protocol of lowering R, but does anyone really want it? I think mathematicians should know methods to measure information content in the data, and that would probably a better route to take. Pavel