Following a broadcast on the TV station the night before about a councilman having been pulled over for drunk and driving, Joe, a political cartoonist, drew a political cartoon of a local city councilman, obviously drunk and with his clothes in disarray having difficulty walking down a straight line on the road with a sober police officer looking on. This was published the next day in the paper for which Joe works. The city councilman involved had disagreements with Joe in the past and intensely disliked him. It turned out that the story published by the TV was an error, but the city councilman chose not to sue the TV reporter and the station, rather he sued Joe for defamation. What would Joe's best defence be and indicate the likely outcome?