Kaboooom is correct here. We know the laws of physics are the same in Andromeda because it exists within the same universe as us, and because astrophysicists, cosmologists, and astronomers can also observe and have data supporting that the physical laws of the universe are the same in Andromeda as they are for the Milky Way.
Second, the word theory has entirely different meaning in the realm of science than it does in popular usage by the general public. You are using it in the manner that the general public often does, in the sense that it just means 'speculation.' In general usage the word theory refers to a hunch, often based on fragmentary evidence or completely unsupported by it. But that isn't what a theory is within the realm of science. A scientific theory is an explanation for some aspect of the natural world supported by a vast body of verifiable evidence obtained through detailed observation and experimentation.. Creationists often misunderstand this when they declare that 'Evolution is just a theory.' Gravity and plate tectonics are also theories.
Exactly. I don't know - I have very few "pet peeves", and perhaps it is my background in science that makes this one of them. I've often thought that perhaps this is a trivial complaint - to expect people to understand very basic principles of logic and the scientific method.
But then I think, this is 2015. Our civilization is literally built on these concepts. People should learn them, regardless of if they are going into a field related to science or not. It's fundamental knowledge to have.
One of the reasons why I love good science fiction is because it takes these concepts and extrapolates and embellishes them. It's good old fashioned fun. Obviously, it falls far short of reality most of the time, for the sake of entertainment. I guess I always assumed that most fans of science fiction would either have a background in science like myself, or at least an interest in it such that they are familiar with basic concepts. I mean, why else would one be interested in the subject matter? So his posts were surprising to me, because of how off-base they were. Maybe he simply phrased his thoughts incorrectly and came off wrong...I'd like to give the benefit of a doubt.