Lack of technological knowledge. For example, the concept of teleportation. In the past, people didn't have the understanding of physics and technology required to even conceive of how it might be possible. So it was relegated to science fiction.
Limited resources. Concepts like flying cars were considered science fiction partly because the resources needed to develop such things were not available. There was not enough advanced engineering knowledge, materials, or funding to make them a reality at that time.
Social and cultural factors also played a role. Some ideas were just too far - fetched for the society's mindset at that time. For instance, the idea of artificial intelligence with human - like intelligence was considered science fiction. People were not used to the idea of machines being able to think and learn like humans, and there were also ethical and moral concerns that made it seem more like a fictional concept.
Some works are considered the best because they have unique and imaginative concepts. For example, 'Dune' has a complex ecosystem and political intrigue set on a desert planet. It also has deep philosophical undertones. Another reason is the creation of memorable characters. In 'The Martian', Mark Watney is a character that readers can really get behind, his resourcefulness in a harsh Martian environment makes the story engaging.
1984 is considered science fiction because it presents a dystopian future society with advanced surveillance technologies and totalitarian control that were imagined and not yet a reality at the time of writing.
Some last names are considered the best in fiction because they are unique and memorable. For example, 'Scrooge' from 'A Christmas Carol'. The name has come to represent a miserly and grumpy character so well that it's widely known. It helps in creating a vivid image of the character in the reader's mind.
Some science fiction books are banned because they might be seen as too subversive. For instance, if a book questions the existing social order or political system in a very radical way. It could make those in power or conservative groups uncomfortable, so they try to ban it.
Divergent is considered science fiction because it presents a dystopian future society with advanced technologies and unique social structures that are typical elements of the genre.
Dystopias are often seen as sci-fi because they imagine futures with advanced tech and social structures that are far from ideal. These elements are common in science fiction.
Dawn might be classified as science fiction because it often involves futuristic concepts, advanced technologies, or explores alternate realities and possibilities.
It's because of its mind-bending concepts like entering and manipulating dreams. The technology and ideas presented are way beyond our current reality.
ET is seen as science fiction for several reasons. First, the presence of an extraterrestrial being is a common theme in this genre. Also, the story often explores concepts related to space travel and unknown worlds, which are staples of science fiction.
The reason Frankenstein is classified as science fiction is that it incorporates elements such as advanced scientific methods and the impact of those on society and individuals. It imagines what could happen when science goes beyond certain boundaries.