Unverified50% confidenceOpinionExact time
The coincidence of 500 million inches stems from the alignment of two independent factors: the artificially created integer circumference of 4 billion centimeters from the definition of the meter, and the conversion factor from centimeters to inches happening to be close to π/8.
1
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50%
Confidence
Long-term
Relevance
10/10/2026
First Seen
Sources
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Related Claims
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