What defines a human, biology uses human constraints to define them. Every attribute is actually a constraint. For example, man has the highest intellect in the animal kingdom. This is the distinction that elevates the species above the beast, yet how smart is a man actually?
For thousands of years, society has had a general benchmark of how high a man's intellect should be. The accepted average IQ score falls between 85 and 115. This benchmark is what defines who is smart and who is stupid. Then what happens when this limit is passed? Why was the limit imposed, to begin with?
Going above an IQ of 140 categorized the person as a genius. They were still human but a little special. But what happens when you double that? Triple or even quadruple it? Can you really still consider those people humans?
The limits of the body similarly follow the same problem. Can you call people who can bench press a fully loaded bus human? What about if they benchpress a building?
