| A logical fallacy where an authority is cited in support of the argument. An Appeal to Authority is invalid when
Also, be wary when you hear the expert's testimony through second-hand sources. hearsay is usually inaccurate.
Example: The one given in Blackavar's writeup in ad vericundiam. Bill Clinton isn't a cigar expert.
Example: "J. Random Psychologist says recovered memories are always fake." Many psychologists disagree on this topic.
Example: "Linux is a movement to overthrow the government! Linus Torvalds said he plans on world domination"
To prove the fallacy, show that one of the bullet points above applies. | 
