The document outlines 12 common assumptions about academic writing, including that the main purpose should be stated clearly at the beginning, the reader should never have to guess the writer's meaning, and the writing should be well-organized, supported by credible details, and use formal language and correct grammar. It also assumes the main point will be repeated and reaffirmed, a generalization will be made and supported with specific details, topic sentences will introduce each paragraph, and sources will be cited to avoid plagiarism.