 In analytic philosophy, towards the end of the twentieth century, interest in these problems waned, but there has been a revival of interest in recent years. This is in part due to the fact that philosophers have begun to explore in earnest the possibility that we come by our knowledge of other minds in much the same way that we come by our knowledge of objects in the world—by perception. This possibility is also explored in phenomenology and in recent times philosophers schooled in both the analytic and phenomenological traditions have contributed to discussion of this topic. Some philosophers have found inspiration even further afield, in the texts of Indian Buddhist philosophers. Philosophical interest in other minds has also been stimulated by work in psychology and neuroscience. A more naturalistic turn in philosophy has led to questions concerning our understanding of others. One might see this work as leaving behind traditional epistemological concerns with radical scepticism, addressing instead the question of how we go about ascribing mental states to others—a question that can be asked not just of adult humans, but of infants (when and how do they come to ascribe mental states to others), and also of other, non-human, animals. Furthermore, one can consider the possibility of a deficit in the capacity to attribute minds to others and how this might manifest itself in, for example, autism.