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The order of the books ( or the teachings from which they are composed ) is not certain, but this list was derived from analysis of Aristotle's writings.

It goes from the basics, the analysis of simple terms in the Categories, the analysis of propositions and their elementary relations in On Interpretation, to the study of more complex forms, namely, syllogisms ( in the Analytics ) and dialectics ( in the Topics and Sophistical Refutations ).

The first three treatises form the core of the logical theory stricto sensu: the grammar of the language of logic and the correct rules of reasoning.

There is one volume of Aristotle's concerning logic not found in the Organon, namely the fourth book of Metaphysics.

Despite these achievements, the influence of Aristotle's errors is considered by some to have held back science considerably.

Bertrand Russell notes that " almost every serious intellectual advance has had to begin with an attack on some Aristotelian doctrine ".

Russell also refers to Aristotle's ethics as " repulsive ", and calls his logic " as definitely antiquated as Ptolemaic astronomy ".

Russell notes that these errors make it difficult to do historical justice to Aristotle, until one remembers how large of an advance he made upon all of his predecessors.