Ignorance breeds confidence

Darwin says:
"Ignorance breeds confidence, whereas knowledge does not. Those who know less are more confident that this or that problem cannot be solved by science, while those who know more are more cautious."

Russell says:
"The problem with people is that stupid people have too much confidence in themselves, while knowledgeable people are always skeptical."

Aristotle says:
"The ignorant speak with certainty, while the wise doubt."

Nietzsche says:
"Great minds are always doubters."
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You must express your opinion according to your experiences and your understandingaa