It is never easy to define what is normal or what is the quality of normal. In specific terms, we can say that normal is everything that adjusts the parameters correctly established for certain phenomena, people or lifestyles. Normality, then, will be the existence of normal elements and adjusted to those parameters.
Usually, the notion of normality is applied to situations, events or phenomena related to society. This, however, is very particular since when we talk about social issues it is extremely difficult to define what is normality and what is not, unlike what happens with nature or what is empirically observable. At the same time, today's societies are so rich and diverse inside that it is impossible to conceive of normal parameters if differences and variables must be recognized for each reality.
On the other hand, when speaking of empirical phenomena such as physical, chemical, biological, the normality parameters are much easier to define than in the first case. Thus, for this type of phenomenon, the sciences establish a number of characteristic elements that are observed in most cases. Once these parameters have been established, each future observation may result in elements or variables of greater or lesser normality. For example, when the feeding of an animal is observed, it is considered that there are parameters of normality according to whether it is herbivore, carnivore or omnivore.
The parameters of normality are, without a doubt, an artificial invention of the human being to put order and organize the world around him. As we have said, many aspects of the daily life of the human being are not, however, so easily definable because they are not the representation of the idea of 'stimulus-response' but they are much more complex than that.
