В книге же она горячо утверждала, что сквибы "ещё как видят" дементоров...

Incidentally, Arabella Figg never saw the Dementors that attacked Harry and Dudley, but she had enough magical knowledge to identify correctly the sensations they created in the alleyway.

'I'm a Squib,' said Mrs. Figg. 'So you wouldn't have me registered, would you?'

'A Squib, eh?' said Fudge, eyeing her closely. 'We'll be checking that. You'll leave details of your parentage with my assistant, Weasley. Incidentally, can Squibs see dementors?' he added, looking left and right along the bench.

'Yes, we can!' said Mrs. Figg indignantly.

Fudge looked back down at her, his eyebrows raised. 'Very well,' he said aloofly. 'What is your story?'

'I had gone out to buy cat food from the corner shop at the end of Wisteria Walk, around about nine o'clock, on the evening of the second of August,' gabbled Mrs. Figg at once, as though she had learned what she was saying by heart, 'when I heard a disturbance down the alleyway between Magnolia Crescent and Wisteria Walk. On approaching the mouth of the alleyway I saw dementors running--'

'Running?' said Madam Bones sharply. 'Dementors don't run, they glide. '

'That's what I meant to say,' said Mrs. Figg quickly, patches of pink appearing in her withered cheeks. 'Gliding along the alley towards what looked like two boys. '

'What did they look like?' said Madam Bones, narrowing her eyes so that the edge of the monocle disappeared into her flesh.

'Well, one was very large and the other one rather skinny--'

'No, no,' said Madam Bones impatiently. 'The dementors . . . describe them. '

'Oh,' said Mrs Figg, the pink flush creeping up her neck now. 'They were big. Big and wearing cloaks. '

Harry felt a horrible sinking in the pit of his stomach. Whatever Mrs. Figg might say, it sounded to him as though the most she had ever seen was a picture of a dementor, and a picture could never convey the truth of what these beings were like: the eerie way they moved, hovering inches over the ground, or the rotting smell of them, or that terrible rattling noise they made as they sucked on the surrounding air. . . .

In the second row, a dumpy wizard with a large black moustache leaned close to whisper in the ear of his neighbour, a frizzy-haired witch. She smirked and nodded.

'Big and wearing cloaks,' repeated Madam Bones coolly, while Fudge snorted derisively. 'I see. Anything else?'

'Yes,' said Mrs Figg. 'I felt them. Everything went cold, and this was a very warm summer's night, mark you. And I felt . . . as though all happiness had gone from the world . . . and I remembered . . . dreadful things. . . . '

Her voice shook and died.

В книге Гарри замечает, что она описывает дементоров так, как будто выучила учебник или книгу. Но когда она начала описывать ощущения, это было убедительно

Завязывайте со ссылками на "интервью" и "заявления" автора произведения, данные после написания оного. За редкими исключениями это отвратительные доводы.

данные после написания оного

Три рубля
А там шла речь о том, что они бегают? Надо посмотреть книгу или переслушать.