Variants are classified into . Say scribe "'A'" makes a mistake and scribe "'B'" does not. Copies of scribe "'A's" text with the mistake will thereafter contain that same mistake. Over time the texts descended from "'A'" that share the error, and those from "'B'" that do not share it, will diverge further, but later texts will still be identifiable as descended from one or the other because of the presence or absence of that original mistake. The multiple generations of texts that follow, containing the error, are referred to as a "family" of texts. Textual critics study the differences between these families to piece together what the original looked like. Sorting out the wealth of source material is complex, so textual families were sorted into categories tied to geographical areas. The divisions of the New Testament textual families were "Alexandrian" (also called the "Neutral text"), "Western" (Latin translations), and "Eastern" (used by Antioch and Constantinople).