A misconception concerning the meaning of ‘disease’

‘I only wanted to see what the garden was like, your Majesty -’ ‘That's right,’ said the Queen, patting her on the head, which Alice didn't like at all; ‘though, when you say “garden”, I've seen gardens, compared with which this would be a wilderness.’ Alice didn't dare to argue the point, but went on: ‘- and I thought I'd try and find my way to the top of that hill.’ ‘When you say “hill”,’ the Queen interrupted, ‘I could show you hills, in comparison with which you'd call that a valley.’ ‘No, I shouldn't,’ said Alice, surprised into contradicting her at last: ‘a hill can't be a valley, you know. That would be nonsense -’ Through the Looking Glass and What Alice Found There (Lewis Carroll)