What is a sutra?
What are the rules for writing a sutra?

         alpaksharama - concise

         asandigdham - without vagueness

         saravata - harmony of syntax without redundancy

         vishwatomukham - can have more than one meaning but no self contradiction
                      - minimum number of sutras

         akshobhyama - w/o exuberant adjectives

         anavadyama - logical grammar - no contradiction

         ca sutram sutraviduhu - recognised as sutra by those who are known authorities