 Observe the behavior of our four ancient philosophers in this process. After some initial stages of revision, Socrates always falls in the revised interpretations, and Xenocrates always falls outside. (In this particular example, the behavior of the two is fixed after the initial stage; in other cases, it may take many stages of revision before the status of an object becomes settled.) The revision process yields a categorical verdict on the two philosophers: Socrates categorically falls under \(G\), and Xenocrates categorically falls outside \(G\). Objects on which the process does not yield a categorical verdict are said to be pathological (relative to the revision rule, the definition, or the defined concept). In our example, Plato and Aristotle are pathological relative to (18). The status of Aristotle is not stable in any revision sequence. It is as if the revision process cannot make up its mind about him. Sometimes Aristotle is ruled as falling under \(G\), and then the process reverses itself and declares that he does not fall under \(G\), and then the process reverses itself again. When an object behaves in this way in all revision sequences, it is said to be paradoxical. Plato is also pathological relative to \(G\), but his behavior in the revision process is different. Plato acquires a stable status in each revision sequence, but the status he acquires depends upon the initial hypothesis.