Synonyms of 'anecdotal'
unreliableDictionary, untrustworthy, based on rumour
countless anecdotal reports
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If you say that someone is untrustworthy, you think they are unreliable and cannot be trusted.
His opponents still say he's a fundamentally untrustworthy figure.
Thesaurus for anecdotal from the Collins English Thesaurus
Anecdotal evidence is based on individual accounts , rather than on reliable research or statistics , and so may not be valid .