Obviously. The point is that in interesting games (for example chess) the solution can't be memorized but parts of it can. The point is that in chess we have a solution as good as the mathematical one today (for all practical purposes). It's an interesting point because it matters for practical players - you're no longer afraid your opponent or their team can find "holes" (that is weak moves) in your preparation. You're now only afraid they will play moves you didn't expect.