Anecdotal evidence is based on individual accounts, rather than on reliable research or statistics, and so may not be valid. Anecdotal evidence suggests that sales in Europe have slipped. consisting of short stories based on someone's personal experience
Anecdotal evidence is an informal account of evidence in the form of an anecdote or hearsay. The term is often used in contrast to scientific evidence, such as evidence-based medicine, which are types of formal accounts. Some anecdotal evidence does not qualify as scientific evidence because its nature prevents it from being investigated using the scientific method. Misuse of anecdotal evidence is a logical fallacy and is sometimes informally referred to as the "person who" fallacy ("I know a person who..."; "I know of a case where..." etc. Compare with hasty generalization). Anecdotal evidence is not necessarily typical; statistical evidence can more accurately determine how typical something is