In particular, the word "Fruitopia" was difficult for Hawking's computer to "put together" correctly, and it "took forever" to make the word sound right from the voice synthesizer. [ 6 ] In their book The Simpsons and philosophy: the d'oh! of Homer , William Irwin, Mark T. Conard and Aeon J. Skoble wrote that "They Saved Lisa's Brain" in detail explores "the possibility of a utopian alternative to politics as usual in Springfield." They described "They Saved Lisa's Brain" as an "epitome" of The Simpsons diverse comedic humor, and wrote that it can be "enjoyed in two levels," as both "broad farce" and "intellectual satire." As an example of the episode's farcical humor, they referred to the episode's subplot, which, they wrote, "contains some of the grossest humor in the long history of The Simpsons ." At the same time, the episode is "filled" with what they described as "subtle cultural allusions," such as the design of Mensa group's locale, which is based on American architect Frank Lloyd Wright 's house. Likewise, Lisa's challenge to Springfield calls attention to the "cultural limitations of small-town America," while the episode also argues that intellectual disdain for the common man can be carried too far and that theory can "all to easily lose touch with common sense." They also argued that the episode, as well as the series as a whole, offers a kind of intellectual defense of the common man against intellectuals, which they opined "helps explain its popularity and broad appeal