Not to be pedantic, but was Einstein incorrect at that time/in the future? Were there any actual indications that nuclear energy would be obtainable at that time?
Einstein didn't seem to say, "Obtaining nuclear energy is absolutely impossible, and can never be achieved." All he said was that there is not the _slightest indication_.
I am sorry if this comes off as being semantical, but I just want to make sure I am not misinterpreting you or what Einstein said.
As for the other points, yes. Those were great examples.