(a) How does Plato use the theory of forms to establish the relation between epistemology and metaphysics ? Discuss. (10…

(a) Plato: Forms as the bridge between epistemology and metaphysics

For Plato, what can be known depends on what is. Knowledge (episteme) must be infallible and of what is, while the sensible world of becoming yields only opinion (doxa). Hence the objects of knowledge must be eternal, unchanging Forms (eide), such as Justice, Equality and Beauty.

• Divided Line (Republic VI): grades of cognition map onto grades of being. Imagining (eikasia) grasps shadows, belief (pistis) grasps physical things, thought (dianoia) grasps mathematical objects, and intellection (noesis) grasps Forms through dialectic.
• Allegory of the Cave: education is the turning of the soul from images to Forms.
• Recollection (anamnesis, Meno and Phaedo): learning is the soul recalling Forms it knew before birth, which explains how a priori knowledge is possible.
• Participation (methexis): particulars are what they are by sharing in Forms.
• Form of the Good, like the sun, gives Forms both their being and their knowability.

One theory therefore answers both questions: Forms are the really real and the only true objects of knowledge.

(b) Russell: logical analysis and the atomic theory of meaning

Russell held that the grammatical form of a sentence often hides its logical form, and that philosophy should analyse complex propositions into their simplest constituents, using the logic of Principia Mathematica.

• Theory of Descriptions (On Denoting, 1905): “The present King of France is bald” becomes “there is exactly one x that is King of France, and x is bald”. The description is not a name, so no non-existent entity (Meinong) is needed, and the sentence is simply false.
• Analysis proceeds until it reaches logically proper names (“this”, “that”) whose meaning is the object known by acquaintance.

Logical atomism (1918): the world consists of atomic facts (a particular having a quality or standing in a relation). Atomic propositions picture these facts, and molecular propositions are truth-functions of atomic ones. The meaning of a complex sentence is fixed by the meanings of its atoms and the logical connectives, and language and world share the same structure. This is the atomic theory of meaning.

(c) Later Wittgenstein: language as a form of life

In the Philosophical Investigations Wittgenstein rejects the Tractatus picture theory, in which a name means the object it stands for.

• Meaning is use: “the meaning of a word is its use in the language” (PI 43).
• Language-games (Sprachspiele): giving orders, describing, reporting, joking are many activities with different rules, related by family resemblance rather than one essence.
• Form of life (Lebensform): “to imagine a language is to imagine a form of life” (PI 19). Words are woven into shared human practices, and understanding rests on “agreement in form of life”, not in opinions.
• Rule-following and the private language argument: a rule needs a public standard of correctness, so a purely private language is impossible (beetle in a box).

Tenability: the view explains how meaning is learnt and stable without mysterious mental objects, and dissolves pseudo-problems. Critics charge relativism and conservatism, since justification ends in “this is what we do”, and question how criticism across forms of life is possible. Its strength is that it grounds meaning in public practice.

(d) Husserl: psychologism and transcendental phenomenology

Psychologism is the view that the laws of logic are empirical laws of human thinking, so that logic is a branch of psychology (J. S. Mill, Sigwart, Lipps).

Husserl’s critique (Logical Investigations, Prolegomena, 1900):

• Logical laws are exact, a priori and necessary, whereas psychological laws are vague, inductive and probable.
• Psychologism confuses the act of judging (a real, temporal event) with what is judged (an ideal, timeless meaning).
• It leads to relativism, which refutes itself.

Avoiding psychologism without naive realism:

• Epoché: the natural attitude and belief in the existence of the world are bracketed.
• Eidetic reduction: by free imaginative variation one grasps essences, not empirical facts.
• Transcendental reduction: the pure (transcendental) ego is revealed as the field in which meanings are constituted. Consciousness is intentional, with the act (noesis) and its object-as-meant (noema) as correlates.

Since meanings are constituted by transcendental, not empirical, consciousness, logic keeps its ideality. Critics ask whether the transcendental ego is itself a disguised psychological subject.

(e) Kant: apperception, space and time

Transcendental apperception is the original synthetic unity of self-consciousness: “The I think must be able to accompany all my representations” (B-edition, paragraph 16). It is not empirical self-awareness through inner sense, but the formal condition under which a manifold becomes one experience of an object.

• Transcendental exposition of space: space is an a priori form of outer intuition, which alone explains the synthetic a priori truths of geometry.
• Transcendental exposition of time: time is the a priori form of inner sense, which explains change and motion and the principles of succession and simultaneity.
• Intuitions without concepts are blind: the manifold given in space and time must be synthesised through the categories, by the imagination, and the schemata are time-determinations of the categories.
• All synthesis is unified in apperception. So space and time supply the matter of unity and apperception supplies its form, and together they make objective experience possible, while things in themselves remain unknowable.