Dr Hyde and Mr Jekyll explains that degenerate brain can function in both normal and degenerate mode. The normal way in public and degenerate way in private or among other degenerates during judeo-satanist rituals. Please notice that both writers, Robert Louis Stevenson and Arthur Conan Doyle were not English, but respectively Scottish and Irish. It is plausible to presume that since the elite is usually displaced in the capital, which is London in case of Britain, both writers managed to understand something was not right with the elite in London, which made them write books explaining about degenerates and ways to detect them. In case of Robert Louis Stevenson, he managed pretty well to describe a single well educated degenerate who was able to successfully hide his secret degenerated identity and to never get caught despite committing ritual murders. This is the same behavior we can witness from the modern elite. They are well educated, able to commit unthinkable crimes and gruesome rituals, but are never arrested by government officials, sometimes inexplicably, sometimes because of witnesses death.