Anecdotal (adjective)

1. Based on or consisting of anecdotes, or short and often amusing or interesting stories about a real incident or person.
2. Not scientifically proven or verified; based on personal observation or experience.

Origin:

From latin anecdotalis, from greek anekdotos "not published", from an- "not" + ekdotos "published".

Examples:

1. The evidence presented was largely anecdotal and lacked scientific rigor.
2. The book was filled with anecdotal stories about the author's travels.
3. Anecdotal evidence suggests that the new medication has a positive effect on patients.
4. The report relied heavily on anecdotal information rather than data.
5. The speaker's talk was filled with anecdotal examples to illustrate her points.