The apparently unassuming code of public behavior, the evidence-only constraint on scientific argument that constitutes all the method science needs to set humanity marching inexorably toward truth, deserves a grand name; I call it the iron rule of explanation. Much of The Knowledge Machine is given over to understanding where the iron rule came from, what it amounts to, and by what means it leads science toward enlightenment. That will be my attempt to settle the Great Method Debate.
