This is a lax, permissive, and weak free software license that is compatible with the GPL. In 2010, he was sentenced to three years' probation for piloting a airplane 26 yrs after dropping his pilot's license and rigging certificates. We suggest that you not use this license for new software program that you compose, but it is ok to use and strengthen Plan 9 under this license. For further more dialogue, see Rea 2001.