Before revision:  This result, which---although undoubtedly correct---has been regarded by many as counterintuitive and even pathological , stems from the implicit assumption that the long-term discount function has an exponential tail.
After revision:  This result, which, although undoubtedly correct, has been regarded by many as counterintuitive and even pathological , stems from the implicit assumption that the long-term discount function has an exponential tail.