to the best of my knowledge
US /tə ðə bɛst əv maɪ ˈnɑlɪdʒ/
UK /tə ðə bɛst əv maɪ ˈnɑlɪdʒ/
1.
based on what I know or understand; as far as I know
:
•
To the best of my knowledge, he has never been late for work.
•
The report is accurate, to the best of my knowledge.