Each of the trillions of human body cells contains six feet of linear DNA strands, if all 46 chromosomes were unpackaged, unwound, and placed end-to-end. Clearly, only an intelligent person could write a library of books onto a material so small as to be utterly invisible. Just as clearly, only a super-intelligence could double the density of that written information by writing what are essentially moldable, modular sentences that can be read in two directions.