Looking at the evidence is not enough. You really must repeat the experiments As you point out, repeating the experiments is sometimes not feasible, at least i

Looking at the evidence is not enough. You really must repeat the experiments As you point out, repeating the experiments is sometimes not feasible, at least in the near term. Often, as technology and understanding develops you can perform other experiments to try to render a theory false (which is all you can ever do- you can't prove a scientific theory true, after all). But until that time comes, which may be decades off, you need to be able to independently analyze the evidence.