It's because we don't think rocks can suffer. And if we're more concerned about our fellow primates than we are about insects, as indeed we are, it's because we think they're exposed to a greater range of potential happiness and suffering.
Tādēļ, ka, pēc mūsu domām, akmeņi necieš. Un, ja mums vairāk rūp primāti nekā kukaiņi, kā tas patiešām ir, tas ir tādēļ, ka, mūsuprāt, tie izjūt lielāku iespējamās laimes un ciešanu spektru.