 Aristotle then contrasts these Pythagoreans with Alcmaeon of Croton, who said that the majority of human things come in pairs, and praises the Pythagoreans for carefully defining the pairs of opposites both in number and character, whereas Alcmaeon seemed to present a randomly selected and ill-defined group of opposites. Aristotle suggests that either Alcmaeon was influenced by these Pythagoreans or they by him. Aristotle was thus not sure of the date of these Pythagoreans but seems to entertain the idea that they either lived a little before Alcmaeon or a little after, which would make them active anywhere from the late 6th to the mid 5th century. Aristotle’s manner of introducing these Pythagoreans suggests that they are distinct from Philolaus and his pupil Eurytus and perhaps earlier (Schofield 2012: 156), but it is not possible to be more specific about their identity. It is possible that Aristotle only knows of the table through oral transmission and that there were no specific names attached to it.