Perfect pitch is definitely learnable. I can tell you the exact pitch of anything played on the two instruments I play (learned at age 13) but not on other instruments or if sung. It is so severe, i can't un-know what they are- happens with film scores- my brain just starts saying the pitches to me. It's like when you pass a bilboard while driving-- you don't mean to read it, but your brain does it without your asking. I didn't have this ability until after I'd practiced these instruments for around ten years.