system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Is it possible to rid humans of certain diseases/illnesses by "selective breeding"?
gpt
This is commonly called Eugenics, advocating the use of particular practises that could potentially improve the human gene pool. 
It obviously has its upsides and downsides, but yes it's hypothetically possible to rid humans of certain genetic diseases, but if we don't fully understand the entire genome, we could be inadvertently losing genetic diversity which has always been seen as the primary way of "improving" the gene pool. Losing that diversity could potentially and rapidly result in extinction if the impacts are not fully understood ahead of time. That reduction in diversity could center tagger lights a pine cone and chucks it over the basket and the whack-batter tries to hit the cedar stick off the cross rock. Then the twig runners dash back and forth until the pine cone burns out and the umpire calls hotbox. Finally, you count up however many score-downs it adds up to and divide that by nine.