[Update: some of his examples are so good, so I will just share them here. To test the salinity of the ocean accurately how many water samples would you need to take?  Although the ocean contains ~$10^{21}$ liters of water, only a sample of a few milliliters ($10^{-3}$) is necessary to get a good estimation.   That’s -24 orders of magnitude (compared to  -5 orders of magnitude for presidential polls).   Although I would guess that the entropy (uniformity) of ocean salinity is much higher than that of political opinions.  Another example is identifying faces.  Faces have their appearance based on millions of cells, however, people can readily identify a face based on only a few bytes of data such as a black and white pixelated image.]