Final answer:
The uncorroborated information directly observed by another police officer is presumed to be reliable in establishing probable cause.
Step-by-step explanation:
In the context of establishing probable cause, uncorroborated information directly observed by another police officer is generally presumed to be reliable. This means that if another police officer directly observes an incident or behavior that gives rise to suspicion, their observation alone can contribute to establishing probable cause. However, it is important to note that the reliability of the information may still be subject to scrutiny by the court.