While hilarious, Lil Wayne is actually smart for his comments. Deposition are for discovery purposes. It helps the lawyers prepare for the trial. Clearly, the lawyer was trying to get Lil Wayne to admit to his criminal past as leverage to say the portrayal of him in the documentary was correct. You can't prove memory. I can say I don't recall what 2+2 is and there is no way you can prove that I can recall it.
And the outcome of the deposition is that Wayne is a guy who can't remember important moments or periods in his life therefore his recollection, or lack thereof when it comes to consent, is worthless. He's destroying his own case.
Wayne doesn't need to admit to his "criminal past" - it's on record. This is a civil action. There is no reason why it could not be referred to as fact.
"No comment/I don't recall" or any variation of that is simply redundant when you're the one that has to build a case and when you're using it right off the bat in response to soft questions.
I would be the first one to advise anyone to "no comment" the entirety of a police interview. This is not the same thing. Clearly BX is, on the whole, too ignorant to realise this.