Panrationalism (or comprehensive rationalism or justificationism) holds two premises true: In epistemology and in its broadest sense, rationalism is any view appealing to reason as a source of knowledge or justification (Lacey 286). ...

1. A rationalist accepts any position that can be justified or established by appeal to the rational criteria or authorities.
2. He accepts only those positions that can be so justified.

The first problem that need to be dealt with is what is the rational criteria or authority that they appeal to? Here the panrationalists diverge into two groups: This article is not about continental rationalism. ...

1. Intellectualists — to whom the rational authority lies in the human intellect, in the faculty of reason.
2. Empiricists — to whom the rational authority is achieved by sense experience (such as seeing or hearing).

Descartes is considered the father of intellectualism and gave the illustration cogito ergo sum as the paradigm to demonstrate what he believed. René Descartes René Descartes (IPA: , March 31, 1596 – February 11, 1650), also known as Cartesius, worked as a philosopher and mathematician. ...

The problem of both these appeals is that:

1. Intellectualism is "too wide" by letting too much in (basically everything, in a strict sense). And Kant radically underminded it in his antinomies.
2. Empiricism is "too narrow" in that it excludes too much (basically everything, in a strict sense).

Immanuel Kant Immanuel Kant (April 22, 1724 – February 12, 1804) was a Prussian philosopher, generally regarded as one of Europes most influential thinkers and the last major philosopher of the Enlightenment. ...

External links

• Pancritical rationalism
• Critical rationalism

Pancritical rationalism (PCR) is a development of critical rationalism and panrationalism originated by William Warren Bartley in his book The Retreat to Commitment. ... Critical rationalism is an epistemological philosophy advanced by Karl Raimund Popper, which is a logical generalization of his approach to science, falsificationism. ...

Reference

• W. W. Bartley, The Retreat to Commitment, La Salle; Open Court Publishing Company, 1984.