I'm saying it's a fallacy is you use sampling bias on one factor to discredit another unrelated factor.
If you pick a sample to test a new painkiller, you should include an equal amount of men and women, old and young people, people of different ethnic backgrounds, etc. to have a balanced sample.
On the other hand, you do not need to have equal shares of people whose favorite color is blue, red, green, etc. because that clearly has no relation with how people would react to medicine.
If you pick a sample to test a new painkiller, you should include an equal amount of men and women, old and young people, people of different ethnic backgrounds, etc. to have a balanced sample.
On the other hand, you do not need to have equal shares of people whose favorite color is blue, red, green, etc. because that clearly has no relation with how people would react to medicine.