[nitrogen]

Are these widely accepted definitions of "fact", "statement", and "science"? Even if the distinction between "fact" and "statement" in this argument is sound, the example statement, "killing someone", is connected to innumerable "facts" of specific historic creatures having killed specific others, and the fact of their individual success or failure to reproduce is inextricably tied to the biological evolution of a moral instinct, and the cultural evolution of a moral code.

Furthermore, all human behavior can be linked to activity in the brain, which can be studied by neuroscience. Finally, empirical surveys of human behaviors and moral opinions exist.

Therefore, morality is within the purview of science.