retconning the entire premise of the show and Nibbler's nature Opinions on humor are subjective, but I'd like to point out that this was set up from the beginn

retconning the entire premise of the show and Nibbler's nature Opinions on humor are subjective, but I'd like to point out that this was set up from the beginning and not at all a retcon. For example we can see Nibbler's shadow in the first episode: http://theinfosphere.org/Nibbler%27s_shadow http://theinfosphere.org/Nibbler%27s_shadow Edit: link corrected thanks to meandthebean