anecdotal evidence

anecdotal evidence (uncountable)

1. A limited selection of examples which support or refute an argument, but which are not supported by scientific or statistical analysis.
   • 2011 December 21, Helen Pidd, “Europeans migrate south as continent drifts deeper into crisis”, in the Guardian‎:

     Tens of thousands of Portuguese, Greek and Irish people have left their homelands this year, many heading for the southern hemisphere. Anecdotal evidence points to the same happening in Spain and Italy.

• empirical evidence
• scientific evidence