Many systems are organized hierarchically. The CERNDOC documentation system is an example, as is the Unix file system, and the VMS/HELP system. A tree has the practical advantage of giving every node a unique name. However, it does not allow the system to model the real world. For example, in a hierarchical HELP system such as VMS/HELP, one often gets to a lead on a tree such as:
HELP COMPILER SOURCE_FORMAT PRAGMAS DEFAULTS
only to find a reference to another leaf: Please see
HELP COMPILER COMMAND OPTIONS DEFAULTS PRAGMAS
and it is necessary to leave the system and re-enter it. What was needed was a link from one node to another, because in this case the information was not naturally organized into a tree.
Learn what excellence is, how to identify it...This is not a big reading assignment – excellence is scarce, lognormal, long-tailed. Acting on this knowledge is liberating, freeing oneself from vast piles of triviality, knock-offs, petty connoisseurship, over-publishing, and the short-sighted, trendy, greedy. Excellence is long-term knowledge, even forever knowledge.
Excellence, like good taste, is perhaps a universal quality. Analytical thinking is about the relationship between evidence and conclusions, and is fundamental to all empirical work, regardless of field, discipline, specialty. Thus it is possible at times to assess credibility of nonfiction work without being a content expert. Thinking eyes may well have an eye for excellence, regardless of field or discipline.