[lhnz]

The simplification in the title is dangerous without a 'when' attached. Mindlessly downvoting contrarian anecdotes will lead to a hive-mind. Beware.

Opinions overwhelm all other forms of material in a discussion. Anecdotes are actually one up from opinions as they are concrete. You should weight them like so:

Statistical Evidence + Logic > Statistical Evidence > "Common Knowledge/Wisdom" > Anecdote + Logic > Anecdote > Opinion + Logic > Opinion