Human Language, Freedom, and Limits of Knowledge
Human Beings as Symbol Producers
Language and Representation of Reality
Words are symbols we use to express and represent things and ideas. These symbols are arbitrary, conventional, and act as signs.
Connecting Through Language
When we transmit information or exchange messages, we are communicating. One important human characteristic is our ability to communicate. While we can communicate through touch, gestures, or sounds, words allow us to express our feelings without crying or explain our thoughts in detail.
Characterizing Human Language
Our capacity for speech is thanks to the verbal communication afforded by our specialized language layer. Language is a uniquely human ability, a result of our complex brains and vocal apparatus. This capacity allows us to learn any language, whether spoken or signed. Natural language is not determined by nature, but by culture and history. All languages have their own particular system of conventional symbols. As mentioned, human language is a set of symbols that represent an idea or concept. A link exists between what we want to express (a defined concept) and the symbol used. In essence, words do not directly represent reality but do so through a code. For example, a picture represents something directly, while a word refers to a concept. This concept unites the word and reality. While languages differ, the relationship between concept, word, and reality remains constant.
Finally, it’s important to note that language is an open and unlimited system of symbols. Although these symbols are related and ordered, language is reflective, as seen in speech.
Freedom
Freedom is the ability to decide how we act. There are two types of freedom: freedom to do and freedom to want.
Freedom to do encompasses physical freedom (e.g., moving freely), civil freedom (e.g., choosing whom to marry), political freedom (e.g., expressing political views), and religious freedom (e.g., choosing religious beliefs). However, these freedoms are not absolute and are subject to limitations.
Freedom to want, also known as free will, is the absence of external coercion. Two theories address free will: determinism and indeterminism.
Determinism argues that seemingly free decisions are actually predetermined by various causes, such as physical, biological, social, educational, psychological, and theological factors. These causes govern us, even if we are unaware of them, leading to the illusion of freedom.
- Physical determinism posits that the universal principle of causality governs everything. Since everything has a cause and effect, free will, as an exception to this law, is impossible.
- Biological determinism suggests that our actions are determined by chemical reactions in our bodies. These reactions influence our temperament and physical form, impacting our decisions.
- Social determinism emphasizes the influence of social pressures and expectations on individual behavior.
- Educational determinism, as proposed by Skinner, argues that our education shapes our behavior and eliminates free will.
- Theological determinism attributes our actions to a higher power, such as God or fate.
- Psychological determinism asserts that our motivations determine our will. When making choices, we consider the characteristics of each option, and the option with the most compelling arguments is chosen.
Indeterminism, on the other hand, defends the existence of free will. It argues that human behavior is unpredictable and not determined by any factor. Three arguments support indeterminism:
- The psychological argument points to our conscious awareness of making free choices.
- The moral argument and the social order argument are based on the idea that moral responsibility, merit, and demerit would be meaningless without free will.
In short, indeterminism argues that we are free and not predetermined. However, this raises questions about accountability for our actions.
Human Limits and Knowledge
Sensory Experience and Knowledge
Animals perceive the world through their senses, capturing information necessary for survival. Their sensory perception is limited by their neuro-sensory system. Humans, however, go beyond mere perception. We possess a conceptual understanding of the world, linked to our mental representations of things not directly accessible through the senses. For example, a tiger is unaware of the existence of other tigers in the world, but we are.
Human Perception
Our perceptions are formed by the brain’s interpretation of sensory input. For instance, we sense heat and pressure, but perceive pain. Our perception is selective, focusing on stimuli of interest. These stimuli are transmitted to the brain as nerve impulses, which are then transformed into meaningful information. Our understanding of this information depends on context. When the brain receives sensory input, it relates it to memory, identifies it, and assigns a name, like “pencil.”
Perception is subjective, influenced by personal experiences, motivations, and social pressures. Our perception of space and time is also subjective.
Reason and Knowledge
Human knowledge extends beyond sensory experience. We use reason, which allows us to think abstractly. For example, we know that 2 + 2 = 4 without needing to physically verify it. Through intellectual processing, we can understand abstract concepts related to our perceptions. Language enables us to connect with these concepts. While perception gives us access to the particular, reason allows us to think about the universal. From sensory experience, we create concepts in our minds, which are then expressed through words. These concepts, formed through reason, are universal. Reason allows us to connect with reality and think using language, enabling us to judge and reason according to principles. Reason helps us build our conceptual world through three functions: creating concepts from sensory data, establishing relationships between concepts, and forming foundations for knowledge.
Other Sources of Knowledge
While authority, intuition, revelation, and faith are often considered sources of knowledge, their validity is questionable. Authority can be unreliable, as even experts can be wrong. Intuition, being a subjective experience, cannot be verified. Similarly, revelation and faith, lacking empirical evidence, cannot be considered reliable sources of knowledge.