Reason and logic are two closely related forms of thinking involving the comparison of terms which can be studied in terms of mathematics or philosophy and can be considered together as well as apart.

1. There are terms or concepts we conceptualize by rationalizing or observing (by comparing attributes); like Socrates, men, or mortality.
2. There are logical judgements (propositions) we get by comparing terms; like Socrates is a man, and all men are mortal. <— Logic
3. Then there are reasoned inferences we get by comparing judgements and propositions and considering their implications; like since Socrates is a man and since all men are mortal, therefore Socrates is mortal. <—Reason

Or more poetically:

• Reason is the application of “pure logic,” empirical evidence, experiment, and skepticism to find truths, facts, and theories (AKA “critical thinking”).
• Enlightenment is simply the natural conclusions to which reason leads.

Enlightenment, in then in this respect, is the “ends” of using logic and reason to shed light on that which we would not otherwise know. The change between not knowing and knowing. See the Cave metaphor.

The Difference Between Truth and Facts

Truth and facts have a lot in common, but they are not exactly the same. Truth is something that is the case. Facts are true statements. Truth is best described using facts and logical reasoning.

Deductive, Inductive, and Abductive Reasoning Explained

Deductive, inductive, and abductive reasoning are three basic reasoning types. In simple terms, deductive reasoning deals with certainty, inductive reasoning with probability, and abductive reasoning with guesswork.

The Difference Between Fact and Opinion

Facts are things that are the case for sure, they are stated plainly and without bias. Opinions meanwhile inject subjectivity and bias. Since most content in any form contains at least some subjectivity and bias, it is rare to find pure facts and common to find opinion.

Analysis and Synthesis Explained

In simple terms, analysis examines a system by dividing a whole into its parts, and synthesis examines a system by combining and comparing parts.

Inductive Reasoning Explained

We explain inductive reasoning, a bottom-up reasoning method that reasons by consistency, comparing particulars and probabilities to find likely truths.

What is a Truth-Value?

A truth-value is a label that is given to a statement (a proposition) that denotes the relation of the statement to truth.

A System of Categories of Being and Knowledge

We present a system of “logical, epistemological, and ontological categories of being and knowledge” (categories to place all empirical and rational concepts into).

A Priori-A Posteriori, Analytic-Synthetic, and Necessary-Contingent Distinctions

We explain the a priori-a posteriori distinction, analytic-synthetic distinction, necessary-contingent distinction and other logic-based terms.

Types of Propaganda, Propaganda Techniques, and Propaganda Strategies

We present a list of types of propaganda, propaganda techniques, and propaganda strategies used to manipulate public opinion in the modern day.

The Different Types of Reasoning Methods Explained and Compared

We explain and compare the different types of reasoning methods including deductive, inductive, abductive, analogical, and fallacious reasoning.