Information Contact Us Defamation is written or spoken injury to a person or organization's reputation. Libel is the written act of defamation, vs. slander , the oral act of defamation. A curious notion, not entirely supported by what goes on in the courts.
Truth is a very good defense.
If you don't feel like being on the frontier of legal theory, you should build a somewhat better defense. Avoid the impression of malice. State the facts, and then state your opinion separately. This keeps things clear in your mind. In my opinion he's an alcoholic.