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The history of medicine
2000 BC: Here, eat this root.
1000 BC: That root is heathen. Here, say this prayer.
1805 AD: That prayer is superstition. Here, drink this potion.
1940 AD: That potion is snake oil. Here, swallow this pill.
1985 AD: That pill is ineffective. Here, take this antibiotic.
2000 AD: That antiboitic doesn't work anymore. Here, take this root...
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