Edit: this seems to need clarifying. I understand what the line means. What I don't understand is why people use it so much when it repeats the error it purports to correct. In nearly every case where "reality is either 0 or 1" is wrong, "reality is some coefficient of a single variable between 0 and 1" is just as wrong. That is a poor way to champion the richness of reality. What's interesting is how it corresponds to the emotional crimpedness of a world in which everything is gray.