I think you are merely complaining about semantics, but there are plenty of disorders (abnormal conditions) which have an adaptive advantage in some contexts; s

I think you are merely complaining about semantics, but there are plenty of disorders (abnormal conditions) which have an adaptive advantage in some contexts; sickle-cell anemia is a well known example. https://en.wikipedia.org/wiki/Sickle-cell_disease#Genetics https://en.wikipedia.org/wiki/Sickle-cell_disease#Genetics a person who receives one defective and one healthy allele remains healthy, but can pass on the disease and is known as a carrier or heterozygote. Heterozygotes are still able to contract malaria, but their symptoms are generally less severe