Rationalism (noun)

The belief that reason is the chief source of knowledge and morality, or the belief in the power of human reason to arrive at truth.

Origin:

Mid 17th century: from french rationalisme, from rationaliste, from medieval latin rationalis (see rational).

Examples:

1. Rationalism emphasizes the use of reason and evidence to arrive at truth.
2. Rationalism is opposed to empiricism, which emphasizes the role of experience and observation in knowledge.
3. Rationalism, with its emphasis on reason, has been influential in the development of science and philosophy.
4. Rationalism is an important aspect of the enlightenment.
5. Many scientists and philosophers consider themselves rationalists because they believe that reason is the best way to arrive at truth.