I’m not sure what you mean. Variability in physically identical specimens is handled as probability. KO mice are basically the same organism, when they react di

I’m not sure what you mean. Variability in physically identical specimens is handled as probability. KO mice are basically the same organism, when they react differently to the same stimulus it indicates something about all KO mice. When two humans react differently to the same stimulus it tells us something about two humans, but nothing about the rest of the humans.