An ingenious Russian crow that used a lid as a snowboard to slide down a snowy roof persuaded millions of YouTube viewers that animals are not merely beasts of burden – they also want to have fun. Indeed, the natural world appears to be teeming with creatures enjoying themselves in all kinds of different ways, and wildlife experts even claim that bonobos and dolphins have sex for fun.
But how can we know this is the case? Aren’t we really just projecting our human values on to animals? After all, moods are subjective, so it’s hard enough for humans to communicate clearly enough to each other, even when they share the same language – let alone try to figure out what another species might be feeling. So, to keep things simple and empirically testable, the kinds of scientific experiments that have established the ‘feelings’ of animals have focused on responses to stimuli in which cause and effect are not at all complicated such as withdrawal from pain .
Unsurprisingly, this has produced a very limited model of scientifically ‘proven’ animal behaviour, since there are still no clearly identifiable behavioural markers of conscious experience that don’t involve language. We still don’t know how to unequivocally prove what animals may be thinking. We can only claim that creatures such as these fox cubs playing on a trampoline appear to be having fun, since we cannot be objective about what we observe. However, the work of philosophers of science such as Thomas Kuhn, Stephen Toulmin and Patrick Heelan, among many others, questions the long-held view that scientific data are absolutely objective.