Spreading is pessimism about the signs of bad omen, such as: the owl, the crow, the broken mirror, the number 13, and other signs that forecasters consider bad omens and are wary of evil. Signs of a bad omen are matched by other signs of a good omen, such as: charms, a horseshoe, a black cat, five and five, and other signs that inspire optimism.
The use of these symbols, signs, and the like is an ancient phenomenon that has been known since ancient times. It is also widespread among many peoples, especially among primitive peoples, and it is not completely devoid of sophisticated modern societies.
The scientific study of any phenomenon begins with defining its subject. Flying is a specific phenomenon that can be identified and is suitable for isolation and study. What is meant by divination in this research is pessimism regarding bad omens and signs of unluckiness, and optimism regarding good omens and signs of happiness.