Suppose two or more asynchronous ("addpipe") pipelines
begin with "random" stages, and at least one specifies
a "snumber" (seed). Will the random stages interact, or
will each generate the same sequence of numbers as if the
other didn't exist? This is of concern to a programmer
who specifies "snumber" in order to produce a repeatable
sequence.
While the documentation for Pipelines doesn't clarify
this, the Rexx RM states the motivation, "To start a
repeatable sequence of results, use a specific seed as
the [...] argument, ..."
-- gil
