Stupidity lies in wanting to draw conclusions

This quote is from Gustave Flaubert, French novelist and considered the leading exponent of literary realism in his country.
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When you're in an argument and disagree with someone, try to always see the other side. Maybe you can reflect that there's no right or wrong, and each person has their own truths and beliefs. Or not. Have you ever changed your mind about something after many years later?