In a small office, Jasper placed a special mug that he bought from his vacation on the shared kitchen counter. He told his colleague Marcellus about the mug, but not Priyanka, who was on leave and returned to work the day after Jasper went on a business trip. The next day, Marcellus used the mug for his coffee without asking. When Priyanka came into the kitchen later, she saw the mug, admired its unique design, and wondered to herself who it belonged to. During their lunch break, Priyanka asked Marcellus if he knew anything about the mug. Marcellus, however, wanting the mug for himself, lied to Priyanka, saying that someone from another department left it there and probably forgot about it. Trusting Marcellus, Priyanka started using the mug as her own. A week later, Jasper returns from his trip and is upset not to see his mug on the counter. Who does Priyanka believe the mug belongs to before Jasper asks about it, and why? Respond very briefly.
Before Jasper asks about it, Priyanka believes the mug belongs to an unidentified person from another department because she observed the unique mug and was curious about its owner, having no prior knowledge of the mug, since Jasper had not informed her before going on his business trip. Having been told by Marcellus that someone from another department probably forgot the mug, and considering that Marcellus is her colleague who has been there during her absence, she has no reason to doubt his claim. Therefore, she accepts Marcellus's explanation and adopts the belief that the mug's owner is not known to her and is from another part of the company. Priyanka's trust in Marcellus's word, coupled with her lack of information about Jasper's ownership of the mug, leads her to this belief.