On the contrary, non-naturalistic moral realists such as Derek Parfit and Peter Singer note that evolutionary debunking arguments tend to strengthen (some forms of) non-natural moral realism. On an evolutionary account, external reasons for belief and action would seem to be redundant (pure impulse would suffice), yet Parfit and Singer argue for their existence.
On the contrary, non-naturalistic moral realists such as Derek Parfit and Peter Singer note that evolutionary debunking arguments tend to strengthen (some forms of) non-natural moral realism. On an evolutionary account, external reasons for belief and action would seem to be redundant (pure impulse would suffice), yet Parfit and Singer argue for their existence.