Abstract

The moral status of human-animal chimeras that have human brain cells is especially concerning. The concern is that such animals have the same high moral status as human beings. Why? Julian Koplin suggests that support for this concern is based on this claim: capacities unique to humans gives one a high or full moral status. Koplin then proceeds to convincingly object this claim. However, I argue that the concern is instead based on a different claim: for those humans who do have a high moral status, it is their (or some of their) mental capacities that confer this high moral status. Since having a human brain that is not too impaired is sufficient for having these mental capacities, and human-animal chimeras -- with brains composed of a sufficient number, type, and structure of human cells -- will have a human brain that is not too impaired, it follows that such animals would have the same moral status as human beings.