Taken form the first post on the blog Lack of Common Sense:

“Common sense is the collection of prejudices acquired by age eighteen.”  Albert Einstein

Participants in political debates sometimes appeal to common sense, particularly when they have exhausted other arguments. For example, partisans have attacked civil rights for African Americans, women’s suffrage, and homosexuality — to name just a few — as contrary to common sense. Similarly, opponents of many scientific and technological advances have invoked common sense. Such misuse of the notion of common sense exemplifies the fallacy of argumentum ad populum (appeal to the masses).