When Thomas Nagel, in 1974, asked, “What is it like to be a bat?” he concluded that we would never know.3 We have no way of entering the subjective life of another species, he said. Nagel did not seek to know how a human would feel as a bat: he wanted to understand how a bat feels like a bat. This is indeed beyond our comprehension. The same wall between them and us was noted by the Austrian philosopher Ludwig Wittgenstein, when he famously declared, “If a lion could talk, we could not understand him.”
