My Secret Life

The Secret of My Success

In an information state where various agents have both factual knowledge and knowledge about each other, announcements can be made that change the state of information. Such informative announcements can have the curious property that they become false because they are announced. The most typical example of that is 'fact p is true and you don't know that', after which you know that p, which ent...

My Life

News Feature: Secret life.

Before NASA launched its Viking landers to Mars in 1975, Carl Sagan suggested that the Red Planet might harbor “organisms ranging in size from ants to polar bears.” Afterward, he acknowledged that nothing in the landers’ images could be taken as a sign of advanced life. There was one rock, however, that appeared to be inscribed with the letter “B.” But Sagan held off on any sort of celebration....

My Life Philosophy

My life with NF1.