  Scholars dispute concerning the degree to which Aristotle regards himself as beholden to the credible opinions (endoxa) he recounts and the basic appearances (phainomena) to which  he  appeals.[6]   Of course, since the endoxa will sometimes conflict with one another, often precisely because the phainomena generate aporiai, or puzzles, it is not always possible to respect them in their entirety. So, as a group they must be re-interpreted and systematized, and, where that does not suffice, some must be rejected outright. It is in any case abundantly clear that Aristotle is willing to abandon some or all of the endoxa and phainomena whenever science or philosophy demands that he do so (Met. 1073b36, 1074b6; PA 644b5; EN 1145b2–30).