Many people who claim to be professional football players, although they spend a lot of time in their daily lives playing football training and games, actually they don't really belong to this industry, because football games and training are not their main financial source. The above paragraph made the following assumptions during the reasoning process. ['Professional football players have much higher skill levels and income levels than amateur football players.', 'Regular football training and matches are the only way to become a professional player.', 'An athlete cannot be called a professional athlete unless most of his income comes from competition and training.', 'There are some people who regularly play football training and games that do not really belong to the professional athlete industry.']