Here's a breakdown:
* Ethical considerations: The core principle of nonfiction is accuracy. Embellishment violates this principle and undermines the writer's credibility. Readers trust nonfiction writers to present a truthful account, and embellishment betrays that trust.
* Legal considerations: Depending on the content, embellishment could lead to libel or defamation lawsuits if it harms someone's reputation. In some cases, it could also constitute fraud if the work is presented as factual but contains significant fabrications.
* Genre variations: Some nonfiction genres allow for a degree of interpretation or stylistic license. For example, a creative nonfiction piece might use literary techniques like vivid descriptions and personal reflections, but these should not contradict the factual basis of the narrative. However, the line between permissible embellishment and factual inaccuracy can be blurry and depends heavily on context and transparency. The key is that any embellishments should be clearly indicated and not misrepresented as factual details.
* Examples: A biography should accurately reflect the subject's life; a historical account must stick to verifiable events; a scientific article needs to be based on sound data and methodology.
In short, while nonfiction writers employ techniques to make their work engaging, those techniques should not involve fabricating or altering facts. The strength of nonfiction lies in its truthfulness, and embellishment fundamentally undermines that strength.