I think his timeline may be too short, but I don't think it is that far off - 20 years, maybe. I would certainly agree that smell-recognition may be more diffi

I think his timeline may be too short, but I don't think it is that far off - 20 years, maybe. I would certainly agree that smell-recognition may be more difficult than image-recognition. However, there's been a lot of progress on that front, more than I expected just a few years ago.