You&#x27;re making a far stronger claim than denying that some people are not 10x more productive than others. You&#x27;re claiming that anyone can be just as productive as anyone else.<p>That seems to either be such a strong claim that it&#x27;s trivial to refute, (i.e. a newborn baby, or a quadriplegic with severe mental retardation, etc.), or too nebulous and ill-defined to be of any use (i.e. said quadriplegic is productive in cultivating character in carers?)