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Nonsense. If 27% of GDP is suddenly gone, how US economy could be the largest? (rest of the world can substitute US trade between itself)

The US Economy is 53% larger than the next largest, China, in terms of real GDP (Not fake PPP nonsense). 28T vs 18T.

How is PPP "fake"? Nominal only matters specifically for trade, which in this hypothetical is the thing the USA is expressly failing to do.

PPP is more relevant than gdp nominal.