The consequence of erudite vernacular utilized irrespective of necessity is that you wind up sounding like a moron:
Everyone knows how college students will try to make themselves sound smarter by reaching for the thesaurus and using big, ponderous words they barely understand. But now a new study shows that readers can see through this. Daniel Oppenheimer, a psychologist at Princeton, took a handful of writing samples and used a thesaurus to replace the simple words with needlessly flowery ones.
... Oppenheimer gave all the writing samples — the original, simple ones and the modified, flowery ones — to 71 students to evaluate. The result? As the grandiosity and complexity of the language increased, the judges’ estimation of the intelligence of the authors decreased. Oppenheimer wrote up his results in a paper with the gorgeously ironic title “Consequences of Erudite Vernacular Utilized Irrespective of Necessity: Problems with Using Long Words Needlessly.”
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