Reasoning is used by some people for problem-solving and truth seeking. Reasoning is the application of thought that is both coherent and logical and is used by people to make conclusions from certain premises. Reasoning allows one to demonstrate something to another person.
Without valid reasons decision are made based on irrational belief systems. It is not always possible for people to behave rationally when their own train of thought leads to conclusions which are troubling.
Reasoning is a relatively new phenonmena. It is linked to the historical period of cultural development and enlightenment known as the Renaissance. This period was an era of scientific innovation and time of great knowledge discovery.