@Gol
Theoretically, yes! In order to create a system that perfectly predicts the actions of an arbitrary number of humans (or birds, or crabs, or Xenomorphs), you must simply create a universe that contains those things.
That universe is your prediction system, your ‘almanac’, and it will perfectly and accurately predict the actions of every single thing inside it.
Sadly, it will not be of much use to you, who is -outside- that universe, and thus cannot be measured and predicted by it.