You: 'Why are you late?' Them: 'I don’t see how that’s any of your business.'

You ask if they stole your lunch. They say it's none of your business. You're confused. They're smug.

You: 'Why did you fail the test?' Them: 'I don’t see how that’s any of your business.' You: 'You failed the test!' Them: 'Still not your business.'