If you're arguing fair user, you've already lost. That's a matter of opinion so it has to go all the way to a jury verdict. That means there's no guarantee and

If you're arguing fair user, you've already lost. That's a matter of opinion so it has to go all the way to a jury verdict. That means there's no guarantee and even if you win, you have to pay a couple million for the billable hours. You want a defense that's so obvious, the judge will throw out any case against you on the first day.