What is the meaning of universal result in science?

Answer 1

I have no idea and I am a scientist. I can only presume it means that the result is the same no matter who does the test or when or where. 

The idea is that a thing always does the same thing, applies universally, as long as the conditions are the same at the start.

A lot harder to ensure identical starting conditions than it is to say, though.  More fun though when the results are different.  There has to be a reason, so now you have something to look for: why was the result different?  Shouldn't have been.