How might the story, The Facts in the Case of M. Valdemar, be an example of science fiction?

Edgar Allan Poe is viewed as one of the forerunners of science fiction, and "The Facts in the Case of M. Valdemar" includes a number of elements that would later be developed in the science fiction genre. The narrator views his experience with M. Valdemar as a scientific experiment, and he tries to be an objective observer of the entire process, although Valdemar's unnerving end does shake him. Poe includes such details as scientific pseudo-jargon and an exploration of the implications of dangerous science in order to give the story an air of speculation for the future of science.