Are they? "But we are approaching the truth. Everything in history, and everything in our daily experience tells us this." sounds like a claim of fact. Do you disagree with it? Have we not, collectively, changed our minds on a great many things?
Evolution, heliocentrism, the importance of doctors washing their hands, the non-determinism of quantum physics - all of these are a result of people changing their minds when presented with new facts. Even the importance of car safety belts and harmfulness of smoking. You are literally surrounded by evidence of people changing their minds when presented with new facts, but choose to instead focus on a few experiments where some people didn't change their minds when presented with some evidence on certain topics.
How did the article call it.. confirmation bias?