For the second paragraph: Imagine a man warped out of the past somewhere into the future. His clothes look funny and any interaction he makes with people draws

For the second paragraph: Imagine a man warped out of the past somewhere into the future. His clothes look funny and any interaction he makes with people draws an odd response. Some give him money, some people say "no thank you" for some reason, and so on. He can test this, he can see that nearly everyone behaves this way. So he assumes this is simply how people here behave. Later on, something happens that forces him to wear clothes like everyone else is wearing. And how people react to him changes completely. All his testing proved that people react one certain way, but he didn't understand why so he didn't realize what his testing had showed was actually just a small subset of the actual behavior and was actually an extremely rare case.