- Therefore,dollarexertsaninfluenceglobally.Whenaplane'spropeller,forexample,spinsthroughacloud,thepropellerexertsarearwardforce.It'sapositiveforce,anditexertsanactualandsomehowpalpable,discernibleforceintheworld.Theasymmetryencouragesspeculatingonth...
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