This is simple - he is lying, but as long as nobody can prove he is, it is fine for him. Lying for the benefit of the client is the thing that lawyers do. Of course he knows it couldn't possible take any intelligent person with basic knowledge in the field six month to write this trivial piece of code. But he is hired to try and prove that Google owes Oracle 2 billion dollars for it. So he wouldn't be a good lawyer if he didn't try to claim it is a big deal. Just as criminal defense attorney would not be a good lawyer if he didn't try to claim his client is not guilty even though privately he would think the client did it. Of course, sometimes it looks hilarious, but in most cases it works, and works very well, judging by how much these people earn.