Or, you may say that this business of marking books is going to slow up your reading. It probably will. That's one of the reasons for doing it. Most of us have been taken in by the notion that speed of reading is a measure of our intelligence. There is no such thing as the right speed for intelligent read-ing. Some things should be read quick-ly and effortlessly, and some should be read slowly and even laboriously. The sign of intelligence in reading is the ability to read different things dif-ferently according to their worth.
As Luhmann would say, it is foolish to think that things are black and white; in most scenarios there is nuance... So too is it with reading speed, it must be relative or else it is not accurate. Even speed within books can differ.