Nobody is claiming that 100% of people can be trained to run a 100m in 9.58s. But there is some number of seconds which 90% of people can be trained to run 100

Nobody is claiming that 100% of people can be trained to run a 100m in 9.58s. But there is some number of seconds which 90% of people can be trained to run 100m below. And it wouldn’t surprise me if it’s a much lower number than you think. Likewise not 100% of people can develop the mathematical horsepower of Von Neumann. But 90% of people can attain some level of proficiency in higher mathematical concepts… how high a level would that be? Higher than most high schools aim I would suspect.