6. What it's like ...

6.1  Thomas Nagel, professor of philosophy and law at New York University, argues that it is impossible to know what it's like to be a bat.

6.2  Tom Petty, rock musician, writes, "You don't know how it feels / You don't know how it feels / No, you don't know how it feels / To be me."

6.3  Can one know "what it's like" to be another person -- or animal? I say: of course you can. But within certain limits.