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Carl Sagan Quotes about Evidence

All Carl Sagan Quotes Acceptance Age Art Astronomy Atheism Atheist Authority Awareness Balance Belief Challenges Character Childhood Children Church Community Compassion Consciousness Creation Criticism Culture Curiosity Darkness Death Doubt Earth Education Enthusiasm Evidence quotes Evolution Giving God Greek Heart History Home Humanity Humility Ignorance Imagination Injury Inspirational Judging Knowledge Learning Life Lifetime Love Loyalty Lying Magic Mathematics Memories Moon Morning Motivation Motivational Nature Observation Opportunity Pain Passion Past Perspective Philosophy Physics Prejudice Purpose Reading Reality Rejection Religion Responsibility Risk Romance Running Science Science And Technology Spirituality Spring Stupidity Survival Teaching Technology Time Today Truth Understanding Universe Vision Waiting War Water Weakness Winter Writing
The absence of evidence is not the evidence of absence.

The absence of evidence is not the evidence of absence.

Carl Sagan
Absence, Evidence

Extraordinary claims demand extraordinary evidence

Carl Sagan
Demand, Claims, Evidence

Extraordinary observations require extraordinary evidence to make them believable.

Carl Sagan
Observation, Evidence, Extraordinary

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