What is Hubbard's definition of "pure science fiction"?

Question

In [his 1980 introduction to *Battlefield Earth*](http://battlefieldearth.com/introduction/), L. Ron Hubbard claims that the novel is a work of "*pure* science fiction" and then sets out to define that term. However...Hubbard spends more time defining fantasy than he does science fiction, as if somehow the shade cast by the one will illuminate the other. And each time he starts to postulate a quality of science fiction, he then says it's insufficient and embarks on another reminisce. Once he gets into the concept of purity of genre by way of a roundabout rant on mistaking fantasy for sci-fi but never gets down to cases. After nine rambling pages of name-dropping and shade-throwing I'm left without any clear sense of what he thinks "*pure* science fiction" is, aside from *Battlefield Earth.*What, in concise terms, is Hubbard's conception of "*pure* science fiction"?

Answer 1

Basically in shorter terms, Hubbard's theory was that time spent on a subject is not at all proportional to the clarity of that subject. Overall, his goal was to try distinguish science fiction from fantasy because he believed there was a trend towards mixing genres and considering them SF (Science Fiction). In his perspective, he believed that pure science fiction has no kind of fictional elements in it.