Only 1-5 in 10,000 people can do this!

But tones are a continuous spectrum, not discrete and they say c has drifted over the years with various sensibilities so do they drift with it? and how do they call tones that aren't in the discrete steps...  I think absolute pitch can be learned though. It's just that normal people don't bother allocating brain power to labelling absolutes. Probably not that hard to develop. That chess players can play blind is also a learned skill