as far as (someone) can tell

Translations
насколько (кто-то) может судить
As far as I can tell, there are no errors in the report.
Насколько я могу судить, в отчете нет ошибок.
Definitions
This phrase means 'based on what someone knows or is able to determine.' It indicates that the statement being made is true according to the person's current knowledge or understanding, but there may be things they do not know.
Words
can

verb
уметь
tell

verb
рассказать