Casting lots is a form of prediction where a random output is then interpreted by humans to predict an outcome. This random output can be in the form of dice, oracle bones…etc. To learn more about casting lots, click the link here.
In ancient times, diviners would administer the reading of the oracle bones in a small circle. They would throw the bones, or die relatively far so that they rolled randomly. The diviner would then look at the outcome, and analyze the results. Different combinations of numbers draw distinct phrases from the diviner, which can then be applied to the person in question to the diviners discretion. There is a lot of room for the interpreter of these casting lots to bend the truth, or even give a false idea to the person in question. A modern form of this prediction is rolling dice, and then having an outcome associated with every number. This fits into the #randomized portion of the framework of predictive systems. This system can apply to people who are trying to scam tourists in modern times. I have seen this myself in New Orleans, and even a few times around Cambridge. In ancient times, before there were die, people used bones with distinct markings to mimic dice. Individuals could possibly use this system to make a decision about what seeds to plant, where to move their family, or even to predict the weather.
As for determination and free will, these casting lots fit into both categories. The interpreter may read the numbers produced randomly, and give a forecast of something to come in the near future. The recipient of this information still has free will, although many will say that their free will ultimately leads them to the prediction made by the interpreter. This method of thinking exploits that determinism and free will are connected. Everyone ultimately has free will to act however they feel in the moment, but everything has been determined beforehand, and accounts for the choices that an individual makes. This is a notion I have heard many times, especially in a religious context, and many people believe that applies here as well in the world of predictions.