Book is about how what we think we know limits our ability to know even nd when you talk about the scientists struggle to conceptialize these ideas only because they were so ali an echo location, for example. Part of the argument that runs through the book is the same idea that the philosopher thomas nagel popularized in his classic essay, what is like to be a bat. That it is fundamentally impossible to really understand the subjective experience of another creature. But i guarantee you that every one who really works in this field, every sensory biologist, has thought long and hard about what the creatures they study might experience. And if you ask them, you just get some really cool stuff