Earlier quoted context omitted.
What very confident nonsense! Individual fitness is not independent, let alone group fitness. And without independence you are just plain wrong. Sociology dressed up as a priori mathematics is rarely credible. Even worse if the math simply isn't correct.
> Individual fitness is not independent, let alone group fitness. And without independence you are just plain wrong. Who said that fitness in my description cannot include group fitness? The same argument goes for adding a worker to the workforce. Does the worker fit the existing workforce?
I did. Because doing so contradicts your conclusion. Though I also said it is not necessary. Lack of independence alone makes you wrong.
> The same argument goes for adding a worker to the workforce. Does the worker fit the existing workforce?
Which same argument? The argument you made was about filtering lowering fitness.