Antoine Lavoisier — "The success of charlatans, sorcerors, and alchemists—and all those who abuse pub…"
The success of charlatans, sorcerors, and alchemists—and all those who abuse public credulity—is founded on errors in this type of calculation.
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More from Antoine Lavoisier
"Chemistry is a science of facts and experiments, and not of opinions."
"The most important thing for a man of science is to have a clear head and a good heart."
"Life is a chemical function."
"Science advances by correcting its errors."
"The scientist should be a judge, not an advocate."
Details
From his writings, a direct critique of pseudo-sciences.
Date: Undated, but from his major works.
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Understanding this quote
What it means
People who trick others, like fake healers, fortune-tellers, or get-rich-quick schemers, succeed because their audience cannot properly weigh probabilities. When someone does not know how to judge the odds of a claim being true, an unlikely coincidence feels like proof. Frauds exploit this gap in reasoning. The quote argues that gullibility is not just emotional weakness but a failure of mathematical thinking about chance, evidence, and what counts as a meaningful result.
Relevance to Antoine Lavoisier
Lavoisier spent his career replacing superstition with measurement. He disproved phlogiston theory by weighing reactants and products on precision balances, showing mass is conserved. He also served on a royal commission that debunked Mesmer's animal magnetism through blind trials. For him, quantitative reasoning was the weapon against quackery, and alchemy was the prior generation's chemistry he had to demolish. Dismissing charlatans through probability was a personal mission, not an abstract observation.
The era
Late-1700s France was a battleground between Enlightenment rationalism and lingering occultism. Mesmerism drew huge Paris crowds, alchemical claims still circulated, and lotteries plus early insurance markets made probability a hot topic. Laplace and Condorcet were formalizing the mathematics of chance. Lavoisier wrote amid this tension, just before the Revolution that would guillotine him in 1794. Science was actively defining itself against mysticism, and calculating rather than believing was a radical civic stance.
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