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This is an interesting statement.

While it's true, it obscures the fact that pi is defined as a fraction: Circumference/Diameter.

That this fraction cannot be represented as a numeric fraction is one of the great insights of early mathematics.

I wouldn't call the fact that pi is irrational an insight of "early mathematics." We knew that sqrt(2) was irrational around 500 BC if not earlier. We didn't know pi was irrational until around the time of the American revolution.

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