Greetings Ignoro

Not sure that I understand you correctly, but it looks like you are searching for the wrong word. Logic in general works with strict systems, so there is no way to pop up arguments from the middle of nowhere. You are describing correlation, not causation... The contribution itself means just that you don't have enough information about the system.

If you don't have enough information about the system, the only thing you can do is estimation, so it's closer to probability and fuzzy logic, not a classic one. In a simplest form you need something like a probability with a confidence interval