Don't fall for the abstraction! Mathematically speaking, if you have graphs G1 and G2; you can make another graph H with nodes {G1, G2} and edges {(G1, G2)} an

Don't fall for the abstraction! Mathematically speaking, if you have graphs G1 and G2; you can make another graph H with nodes {G1, G2} and edges {(G1, G2)} and nothing goes wrong. You can definitely view your whole operating system as a graph; it doesn't invalidate having a program running which processes graphs.