
As to something
Expression of Doubt
Use 'as to' to express uncertainty or doubt about a subject.

There's some hesitation as to whether to accept the job offer.
Decision Clarification
'As to' can clarify the specific aspect of a decision being discussed.

We need a decision as to the venue for the event.
Detail Introduction
Introduce details or specifics on a topic using 'as to'.

He gave a thorough explanation as to why the project failed.
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