You might be familiar with the adage about fish in water. In a 2005 commencement speech, David Foster Wallace describes two young fish swimming along when an older fish swims by and says something like, “Morning, boys, how’s the water?” Once alone, the two younger fish look at each other and wonder, “What the hell is water?” Wallace goes on to say that “the most obvious, important realities are often the ones that are the hardest to see and talk about.”