I respectfully disagree.
To qualify a statement by the phrase “to the best of my knowledge” leaves the door ajar, if ever so slightly, for an attorney to prove that you DID have knowledge in some way shape or form at some point in time. A memo or an e-mail, or a phone recording is all it would take.
The phrase “I can’t remember” or “I have no recollection” leaves the attorney with the impossible task of somehow proving that you actually DO remember. How do you prove whether someone remembers something or not?
Regardless of what one may think of Bill Clinton and his eight year soap opera, “As the World Burns”, he was a clever man.
Ask anyone prosecuted by a special prosector recently...