Smoking grass is not really good for one’s memory. Alcohol is even worse. Still, nothing beats the kool-aid.
By recent Congress hearing witnesses:
I have no recollection …, I don’t remember …, I’m not aware …, to the best of my recollection …, never my understanding …, in hindsight, that wasn’t a good idea …, only generally aware …, no specific knowledge …, I don’t know …, I believe I …, I believe that I believe …, I have no reason to doubt that …, at the best of my memory …, at some point somone may …, as best as I can remember …, can you say that again …, my role was to aggregate and present, but I forgot what information was provided to me by whom and when and I kept no file of any of that …,
On can feel the sword of damocles perjury dangling over their heads.