Assume that you don't feel well and go to a doctor. After much study and experimentation, the doctor presents a diagnosis of cancer. He shows you the scans and the results of the tests, he explains in detail what kind of cancer it is and what stage it is in, and suggest a treatment that has a good prognosis. You then go to a second doctor who knows nothing of this, and he performs a lot of experimentation and comes up with a very similar, if not identical, diagnosis, and a very similar treatment suggestion. Then you go to a third doctor, and the same thing. You keep repeating this with 99 doctors in total. Some minor details may have slight differences (such as the estimation of the advancement of the cancer, or minor details in the suggested treatment), but overall they all give pretty much the same diagnosis and the same solution. They all show you the scans and the results of all the other tests for you to see, and you can corroborate that they are all pretty much the same. ...