Second, the ironist exploits a contradiction, incongruity, or incompatibility between the two levels. In her juvenile works, she relies upon satire, parody and irony based on incongruity. A semantic congruity ("One") and a threefold incongruity ("One and Three"). However, the apparent incongruity of the stance of the bearer on the right remains problematical. Joseph Mallozzi explained the resulting incongruity by positing that Harriman is Walter's married name. To some extent it unifies superiority and incongruity theory. This is usually the result of a perceived social incongruity. Wearing this sword with the coronation mantle is an obvious incongruity. Fenton makes a remark about the incongruity between his first name and his obvious ethnicity. An incongruity like Bergson's, in things juxtaposed simultaneously, is still in vogue. Ned and Verity continually attempt to fix the time travel incongruity. The first formulation of the incongruity theory is attributed to the Scottish poet Beattie. It also briefly describes the concept of musical incongruity and its use within the song. Since Supergirl did not exist either, Byrne had to correct this incongruity. Some reviewers noted that seeing a roller coaster in the background was an "incongruity".