I always love it when really smart guys say stuff like this, and one can't get much smarter than Sir Arthur Eddington. I mean this guy was a 'front row in class' astronomer, physicist, and mathematician, and besties with Einstein to boot! Yet, in spite of all that, Arthur was very conscious of the role consciousness played in science, hence the reference to having a lot more to learn about 'and'. Having lived my entire life in the realm of 'and', I surely appreciate this quote from a guy that could do some purty fancy cyphering and such.