 As a consequence, laws are simple and yet highly informative as a part of each best deductive system. The regularity about the cry of the cock and the sunrise is not part of a best deductive system. And whichever regularity is not part of any best system is accidental: it is not a law of nature. The dividing line between laws and accidental regularities is determined by being a part of any best system. Note that no regularity can be regarded as a law of nature in absence of a full system.