My teacher said, 'This is an obscure fact.' I said, 'What’s that mean?' She said, 'It means it’s important.'

My friend said, 'I know a secret about you.' I said, 'What is it?' He said, 'I don’t know.' I said, 'That’s not a secret.'

My mom said, 'I know everything.' I said, 'What do you know?' She said, 'I know the secrets of the universe.' I said, 'You don’t even know your own password.'