“All ravens are black.” (See: Hempel’s Paradox.)

This beauty is deep blue, purple, green, and gray. Not an outlier… is any raven black?

Color is nebulous. It’s not a matter of “how black.” It’s: does this count as black for this purpose?https://t.co/F0d4qhyirN

— David Chapman (@Meaningness) September 17, 2019