I think the parent poster is saying some EM experiments weren't initially replicated because of the peculiarities of the set up, etc. Another example is that s

I think the parent poster is saying some EM experiments weren't initially replicated because of the peculiarities of the set up, etc. Another example is that some people couldn't see the Galilean moons initially. This made initial report of them somewhat questionable, as some observed them and some didn't.