 Al-Fārābī’s logical writings take various forms. Some of them are Long Commentaries on works of Aristotle, which dissect Aristotle’s text in sometimes excruciating detail; only the Long Commentary on De Interpretatione survives in full, though we have parts of others. More friendly are the Epitomes, in which al-Fārābī rewrites works in the Organon from his own point of view. There are also a number of texts that serve as introductions to the Organon, though they are not necessarily elementary. We call attention to three works in this last group. The first, [Indication], teaches that logic is the art of making correct discriminations, and hence is the key to happiness in life as a whole. It also explains that we must study language before we study logic. The second, [Expressions], is a sequel to [Indication] and introduces the vocabulary of logic. 