That's certainly the legal theory that the DOJ is going to push. The counter argument that I'm sure Google will bring to the table is that (a) that advice was

That's certainly the legal theory that the DOJ is going to push. The counter argument that I'm sure Google will bring to the table is that (a) that advice was given in the context of helping engineers understand that legal definitions and vernacular definitions are different, and it is the nature of adversarial court systems that words they think they're using with one meeting can be taken out of context by an opponent in a court case, so think about what they are saying, and (b) all of the above is just facts and the government suppressing a corporation's right to state facts would be a clear and obvious violation of the First Amendment. But these are two legal arguments and it's hard to predict how the court will decide.