 The weight is not so much on the fictionality of events, since the poet can also draw his material from events that actually occurred, but in the way he presents them: whether they actually happened or not, and whether they are physically possible, he must describe them in the way we would think they might happen. It is to be noted that “in all likelihood or out of necessity” is a rephrasing of the well-known “for the most part or out of necessity” motto in the Physics, where “for the most part” describes what actually happens to physical things which obey causal necessity, barring a few exceptions. In the case of poetry, or any other mimetic genre, the only causality we need is “subjective” causality, or plausibility. Aristotle even goes so far as to say: “What is impossible but plausible must be preferred to what is possible but not credible” (24, 1460a27): an event that has taken place, and so is physically possible, but which would not be presented in a plausible way would not succeed in gripping hearers.