"As far as one knows" is a phrase that implies uncertainty and limited knowledge on a particular subject. There are various synonyms for this expression, including "to the best of one's knowledge," "as far as one is aware," "from one's understanding," "as per one's information," and "to one's knowledge." These phrases convey the same sense of incomplete knowledge while expressing the speaker's willingness to share only what they are sure of. Other synonyms may include "as far as I know," "according to my understanding," and "to the extent of my knowledge," which all serve as alternatives to the standard expression of uncertainty "as far as one knows".