Bildiğim kadarıyla, o iyi bir adam.
- He is, so far as I know, a good guy.
Bildiği kadarıyla işler yolunda gidiyordu.
- So far as he was concerned, things were going well.
insofar as (or that), to the extent that, to such an extent.
... as far as 60 miles a day, ...
... very chimneys unfold as far as the eye can see ...