Epistemology: Distinguishing Belief, Opinion, and Knowledge

Distinctions Between Belief, Opinion, and Knowledge

Understanding the nuances of human understanding requires a clear distinction between three core concepts:

• Opinion: A subjective assessment where we lack certainty and cannot provide proof to others.
• Belief: This has two primary uses. First, it can express doubt or uncertainty about a statement. Second, in an assertive sense, it represents a conviction (such as the historical belief that the Earth was flat) held even when we lack sufficient evidence.
• Knowledge: A form of belief where we possess both certainty and the ability to provide proof.

Theoretical and Practical Knowledge

Knowledge is further categorized into two distinct types:

• Theoretical Knowledge: This is constituted by all information that describes and explains the natural and social world around us.
• Practical Knowledge: This is not merely an explanation but the capacity to act; it is the "know-how" in action.

Core Features of Language

Language is characterized by being arbitrary, articulate, and inherently creative.

The Nature of Truth and Reality

The distinction between reality and appearance has been subject to long-standing controversy in the history of philosophy. A prevailing conception suggests that visual perceptions can often be occultations of reality. According to this view, authentic truth identifies with reality in opposition to apparent reality. Consequently, the search for truth is defined as a process of unveiling what is authentic.

The Truth of Propositions

Philosophers evaluate the truth of propositions through different lenses:

• Truth as Correspondence: A proposition is true when there is a fit between what the proposition expresses and actual reality.
• Truth as Coherence: This considers a proposition true when it does not enter into contradiction with the rest of the established propositions.
• Truth as Success: A proposition is considered true when it is useful and leads to successful outcomes.

The Possibility of Attaining Knowledge

Different philosophical positions address whether we can truly know the world:

• Dogmatism: The position that we can acquire universal knowledge and be absolutely sure of its validity.
• Skepticism: The position opposed to dogmatism. Moderate skepticism, such as that of Pyrrho, doubts that steady and sure knowledge is possible.
• Criticism: A middle ground between dogmatism and skepticism, proposed by thinkers like Immanuel Kant.
• Relativism: This position denies the existence of an absolute truth valid for every time and place. It rejects the pretension of objective and universal knowledge, a view held by the Sophists.
• Perspectivism: Associated with Ortega y Gasset, this shares aspects with relativism but does not deny the theoretical possibility of an absolute truth; however, it argues that truth is only accessible through individual perspectives.