Yes, I’m sure the eight vehicles are for him, his wife and six driving age children. To all drive at the same time.

Every thought you have is an assumption, the question is how well-founded they are.

Good luck basing your life on assumptions.

Absent things that are pure math isn't everything Humanity "knows" basically a series of, while highly supported by evidence in a lot of cases, just assumptions about the way things really work?

There’s no pure math in making assumptions about someone’s registrations. In optimal situation one may ask a question. In suboptimal one has to give a benefit of the doubt. An example: lawyers don’t assume. Almost everyone else just assumes stuff. Assuming and not seeking for verification is why there’s so much disconnect between individuals.