See details on the star test at:
http://www.jcu.edu/philosophy/gensler/2.pdf#search=%22wff%20distributed%22

The chapter explains that a letter is "distributed" when occuring
"just after "all"". (Q1:) Does this mean it can't occur a after "is"
to be considered distributed? The explanation isn't quite specific
enough. It goes on to explain that a letter is distributed if occuring
anywhere after "no" or "not".  (Q2:) But wouldn't there be an
exception if a letter did occur after "no" or "not" but also occured
after "all"? I suppose that the term is a reference to "complimentary
distribution" which is a math term (according to Wikipedia).

(Q3): How does the star test work?