Final answer:
Julia's attitude is dismissive and uninterested when Winston discusses the principles of Ingsoc in "1984"; she is more focused on personal and practical aspects of daily life.
Step-by-step explanation:
The attitude of Julia when Winston talks about the principles of Ingsoc, doublethink, the mutability of the past, and related topics in George Orwell's novel "1984," is generally dismissive and uninterested.
Julia is more pragmatically focused on their personal relationship and the immediate pleasures and challenges of their daily lives, rather than the theoretical or ideological aspects of their society.
This contrast highlights the different ways in which individuals might react to oppressive regimes and their propagandist foundations, with some, like Winston, being deeply concerned with the principles and their implications, and others, like Julia, being more concerned with the practicalities of life within the system.