Anecdotal evidence might not be 100% reliable, but it is worth taking into consideration when examining all the evidence.
The expression anecdotal evidence refers to evidence from anecdotes . Because of the small sample, there is a larger chance that it may be unreliable due to cherry-picked or otherwise non-representative samples of typical cases. [1] [2] Anecdotal evidence is considered dubious support of a claim; it is accepted only in lieu of more solid evidence. This is true regardless of the veracity of individual claims. - Wikipedia.