to the best of (one's) knowledge

to the best of (one's) knowledge

As far as one is aware; according to one's genuine knowledge or opinion. The shopkeeper assured investigators that, to the best of his knowledge, he had not seen the suspect pass through that morning. To the best of my knowledge, we should be done with the seminar around lunchtime.
See also: knowledge, of

to the best of your beˈlief/ˈknowledge

as far as you know: He never made a will, to the best of my knowledge.
See also: belief, knowledge, of