Hallucinating vs daydreaming

[nithya]

Test No. incompl/advan-78 "GMAT Verbal Quiz", question 4

I'm sorry to tell you but she is simply ......... that this will be the result but she has no actual proof.

(a) daydreaming
(b) hallucinating
(c) hypothesizing
(d) dithering

Test No. incompl/advan-78 "GMAT Verbal Quiz", answer 4

I'm sorry to tell you but she is simply hypothesizing that this will be the result but she has no actual proof.

Correct answer: (c) hypothesizing
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Why not hallucinating?

nithya

[Alan]

Hi,

Hallucinating is too strong here as we need to express the idea of supposition. Hallucinating would refer to some kind of medical condition.
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English as a Second Language
You can read my ESL story Present Simple

[Snoopy_Blah_Blah]

Why not "daydreaming"?

[Licinio]

I selected hypothesising, but it was marked as incorrect and dithering was suggested as the right answer.

[Beeesneees]

I just tried it and it worked correctly, indicating hypothesizing is the correct answer. Could you have mistakenly selected a wrong answer?
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