What doesn't help is that most of the people who answer are almost making up their own answer. The only way to be somewhat sure of finding your answer is to do the work and check multiple references, and only pay attention to answers from others who give information that isn't filtered by their own version of sensibility. Peoples' answers make sense to themselves, but they cloud the issue unless they look seriously for the answer rather than coming up with what sounds good or giving nothing more than an opinion.
The lady whose son has dwarfism but is normally proportioned has one of the few good answers, and the majority should be ignored.
By her answer you can assume that the terms dwarf and midget are not exact, and to debate that each refers only to one sort of body type is not 100% accurate
Therefore, any debate about these terms cannot have a true, clear outcome, other than one side insisting their opinion is correct, which is not debate and serves nothing since debate needs clear subject matter. Without that, a debate can't actually be "won". In the context of this thread, the only broadly accurate thing I see that could be said about the two terms is that there is a generalized usage of the two terms, but that they are not specific terms with an absolutely clear usage.
Finally, to throw in with the off-topic debate: It is never true that there is no gravity in space. The condition of an astronaut in space is called free-fall, or weightlessness. The most accurate term is microgravity, to my understanding and that of another poster. If there were no gravity in space, it is likely all the other classical forces of nature could not exist, either, and matter itself would not exist as we know it. Gravity affects all matter.
- Staked Plains Texan