I have NOT studied the complete history of Arthur C. Clark, but I seriously doubt he engineered the ability to launch into orbit, maintain orbit, and synchronize a set of satellites at 30,000+ km above the earth. that would take a large operation of many engineers and scientists. It is very different to say one day we will be able to have geosynch satellites and describe the general concept, and quite another to actually make that happen. Today the courts are filled with patent infringement suits brought by people who 30 years ago drew out a concept in crayon that they thought might someday be possible. Those idiots had no clue about how to make that concept work. But because they dreamed about it and the US Patent Office was stupid enough to issue a patent on a dream, they often get large settlements. The guy who dreamed up the flying astro-car in a briefcase that George Jetson flew on his work commute was just dreaming. No one has ever built one yet, even half of a century later. But if they did build one would the credit for the invention of same go to the cartoonist or the actual inventor? IMO the credit should go to the actual inventor.