Galileo Galilei — "By denying scientific principles, one may maintain any paradox."
By denying scientific principles, one may maintain any paradox.
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Understanding this quote
What it means
When someone refuses to accept established facts and evidence, they can justify any absurd or contradictory belief they choose. Without shared empirical ground, rational debate collapses and anyone can claim anything is true, no matter how contradictory or unsupported. Rejecting foundational scientific truths doesn't make those truths disappear—it just untethers the denier from reality.
Relevance to Galileo Galilei
Galileo spent decades battling those who denied heliocentrism, telescope evidence, and celestial mechanics despite observable proof. The Church's Inquisition forced his 1633 recantation precisely by refusing his empirical demonstrations. He watched authorities maintain paradoxes—Earth at the universe's center despite Jupiter's moons, Venus's phases, and sunspot motion—by simply rejecting his methods.
The era
The early 17th century pitted emerging empirical science against entrenched Aristotelian doctrine and Church authority. Scholasticism held that ancient texts outranked observation. Galileo's contemporaries genuinely maintained cosmological paradoxes by dismissing telescopic evidence as illusion, demonstrating exactly the phenomenon he described—authority substituting for evidence in an age before scientific consensus had institutional protection.
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