ADJ as to wh
Adjectives with other meanings
There are a number of other adjectives which have this pattern.
It's essential to be very, very careful as to how these groups are handled.
'This country now has no charms for me,' he said, 'and I am perfectly indifferent as to what part of the world I may go to.'
The preposition as to is sometimes followed by a noun group.
ambiguous ambivalent careful indifferent sceptical silent specific
The poem is ambiguous as to the outcome of the raid.
There is a moral system, but it is simply silent as to the problem at hand.
You can, if you wish, be more specific as to your future.