Philosophy of Logic

The Nature of Logic

The Necessity of Logic

The Affirmative Principles of  Logic

Logic and Language

Logic and Science

Logic and Intuition

Sensational Logic and Logic Based on Reality

Definition

Nominal Definitions

Real Definitions (Essential Definitions, Definitions by description, Functional Definitions)

Direct Reasoning

Contradiction in propositions

Even Conversion (Conversio Simpler)

Conversion by Contradiction (Contraposition-Conversion per Contrapositionem)

Indirect Reasoning

Categorical Syllogism

Exceptive Syllogism (Conjunctive, Disjunctive)

Compound Syllogism

Syllogism per Impossible

Induction (Summative Induction, Incomplete Induction, Causal Induction)

Demonstrative Allegories

Argument[= Demonstration]

A Priori  Argument (Demonstration from Cause to Effect)

 A Posteriori Argument (Absolute and Proof)

The Principle of Essences of Causes and the Principle of No- Cause

Demonstration and Theosophy

Demonstration and Polemics

Polemics

The Best Polemics

Methods of Debate

Fallacy (Paralogism)

 Material Fallacies

Formal Fallacies

External Fallacies

Poetry and Rhetoric

Theosophy and Poetry

Rhetoric and Admonishment

Modern Logic

The Language of Logic

Universe of Discourse

 Review and Criticism of the Aristotelian Logic