From “UNIX For Beginners” (2nd ed., 1979) written by him: >The most effective debugging tool is still careful thought, coupled with judiciously placed print st

From “UNIX For Beginners” (2nd ed., 1979) written by him: >The most effective debugging tool is still careful thought, coupled with judiciously placed print statements. However the previous sentence is: >The debugger adb is useful for digging through the dead bodies of C programs, but is rather hard to learn to use effectively.