Which of the following is not considered an example of an anomaly?

The identification of "Foreign diplomat attempts to defect" as not being considered an example of an anomaly is insightful because this situation typically falls into a broader category of known behaviors or events that are documented and understood within the context of international relations and espionage. Defections of foreign diplomats may be significant and newsworthy, but they are often considered part of the political landscape and are thus not anomalies in the same sense as unexpected or unexplained behaviors that signal a potential security issue.

In contrast, unexpected withdrawals of security clearances, frequent late arrivals to work, and unexplained changes in behavior are situations that deviate from the norm and could indicate underlying problems or risks that require further investigation. Each of these examples can be seen as signals of potentially harmful activity or vulnerabilities, making them pertinent to the study of security and counterintelligence. They represent discrepancies that could point to larger issues needing attention, whereas the act of a diplomat attempting to defect is a more predictable political maneuver and thus does not fit the definition of an anomaly in the same way.