  The second chapter begins with an encomium to logic: “How noble is the science of logic, and it commences with knowledge of the five words (millot).” Ibn Ezra seems to be referring to the quinque voces; he names here “high universal”, “lower universal” or “high species”, and “low species”. Understanding species and other such groups are of great use in classifying commandments, as well as in resolving some apparent contradictions between biblical texts. However, the logic applied is extremely basic, and once again, we have no evidence that Ibn Ezra knew more than the basic terminology.