I have this friend who is very intelligent and has great grades in college, but she doesn't have inner speech. She is not a shallow minded person but she cannot comprehend having inner dialogue.

She claims that she cannot think, she just knows something or not. Ideas comes as a sparks. When she closes her eyes, it's black and silent, no pictures, no verbal thinking, absolutely nothing.

How can you not think anything? I cannot do it even for a moment.

Is she conscious or is she just an input/output automaton?