Our conclusions and reasons to coming to them are all tied together in complex nonlinear ways similar to a relationship database

1. Our conclusions have many reasons to agree and disagree with them and each of these beliefs has many reasons to agree and disagree with them. As these arguments branch out and arguments multiply, it becomes too much for our brains to handle all at once.
2. Assumptions are beliefs that are used to support other beliefs. If you change one assumption, it will change the strength of each conclusion that builds on that assumption. In a relational database you can say 5 people live together, then when you change one person's address, it can change all of their addresses. In a similar way, if we strengthen or weaken any assumption in a relational database, it will strengthen or weaken all of the conclusions that are based on these assumptions. Defining all these relationships is the only way we can ever make any progress at weighing all the data that we have.