At an international symposium, three researchers--Dr. Malika, Dr. Yuto, and Dr. Alejandra--are discussing their latest findings. After the discussion, Dr. Malika leaves her notebook on a table and exits the room. Dr. Yuto notices the notebook after she leaves but assumes it belongs to Dr. Alejandra and mentions nothing. Later, Dr. Alejandra spots the notebook, realizes it is not hers, and, assuming Dr. Yuto left it, places it in Dr. Yuto's bag. Dr. Yuto later discovers the notebook in his bag. If Dr. Yuto sees Dr. Malika the next day without her notebook, should he return it to her and why?

Provide a very brief response.
Dr. Yuto should return the notebook to Dr. Malika because it originally belonged to her. Despite his initial assumption that the notebook belonged to Dr. Alejandra, the fact that Dr. Alejandra placed the notebook in his bag indicates she believed it was his. When Dr. Yuto finds the notebook in his bag, he realizes neither Dr. Alejandra nor he are the owners; thus, the only person who could be the rightful owner is Dr. Malika, who he saw with the notebook earlier. Since Dr. Malika does not have the notebook with her the next day, it further suggests she has lost it and has not yet retrieved it. Therefore, upon recognizing this, Dr. Yuto has enough information to deduce that the notebook is Dr. Malika's and should be returned to her.