Definitions for "Anecdotal evidence"
Evidence (usually just a few cases) collected informally, as in anecdotes told from one person to another.
When a number of people claim a certain remedy works, this is often referred to as "anecdotal" evidence. No formal medical studies have been done to prove or disprove the claim.
Data based on reports of usually unscientific observation. Anecdotes are often accounts of an individual's personal experience.
What people say about something; not proven by “hard” (experimental) research.