Asking 'Who am I?' and asking (yourself) 'Who are you?' are identical acts, so that as a 'self' you are as much an 'I' as a 'you'. Only the first of these questions, however, seems to get tangled up in 'self-reference', while the second alludes rather to that which is behind very position. 'Who are you to call yourself 'I'? This is more than a matter of grammar and speech acts. It is very different when Schubert builds a song on the refrain 'my heart' than when Whitman writes a 'Song of Myself' - one converges and the other diverges.