Virtually or practically (2,4,2)
I believe the answer is:
as good as
I believe this is a double definition.
'virtually' is the first definition.
(I've seen this before)
'practically' is the second definition.
(I've seen this before)
(Other definitions for as good as that I've seen before include "effectively" , "Practically" , "'Enough is . . . . . . . . a feast' (2.4.2)" , "of the same standard" , "Virtually" .)