The best way to encompass the future is by building a strong set of beliefs.
Using claims as a first-class citizen in your thinking helps you move towards strong beliefs.
If you don't explicitly state your claims you're never going to move in any direction. Everything will seem kind of relevant and worth pursuing.
Writing down claims can help manifest them. It helps to understand their implications, as well as supporting and opposing claims.
Claims eventually turn into beliefs and beliefs give perspective. They act like gravity. Strong beliefs are something that new information can be attached to.
The best way to get to a good forecast is by making predictions with limited information and trying to find opposing evidence; then using the accumulated insights to improve your predictions.