Final answer:
The discussion of philosophy in Book VII of Plato's work combines both serious and playful elements, with Plato emphasizing the importance of rigorous contemplation while also employing entertaining dialogues.
Step-by-step explanation:
The discussion of philosophy in Book VII of Plato's work can be described as having elements of both playfulness and seriousness. Plato believed that the pursuit of truth required rigorous contemplation and discussion, which can be seen in his exploration of the nature of ideas and the Form of Justice. However, there are also playful elements present in the dialogues, such as Socrates questioning his interlocutors to make them question their own beliefs. Overall, the discussion of philosophy in Book VII combines both serious and playful elements.