Ancient and Medieval Philosophy: Plato and Aristotle
This domain covers Plato and Aristotle, the two ancient authors most often set in the Aragón PAU. You are expected to reconstruct each system as an argument, use its technical vocabulary precisely, and explain where the two thinkers diverge. Biography and dialogue titles earn nothing on their own.
Plato: separate Forms and the ascent of knowledge
The theory of Forms holds that separate, eternal, intelligible realities (eidē) ground both the being and the knowability of sensible things. Sensible objects participate (methexis) in Forms and are imperfect copies of them. Knowledge (epistēmē) is of Forms; opinion (doxa) is of the sensible. The allegory of the cave and the divided line map this onto an educational and moral ascent from images (eikasia) through belief (pistis) and discursive thought (dianoia) to intellection (noēsis). The soul is tripartite - rational, spirited, appetitive - and justice is each part performing its own function, mirrored in the city ruled by philosopher-kings.
Aristotle: immanent form and the four causes
Form is not separate but embodied: hylomorphism. Every natural substance is a compound of matter (hylē) and form (morphē), and form is what makes the thing actually what it is. Explanation requires four causes: material, efficient, formal and final. The final cause (telos) drives biology and ethics. Change is the actualization of potential. The soul is the form of a living body; virtue (aretē) is a stable disposition, a mean determined by practical wisdom (phronēsis), and the polis exists for the sake of living well.
Worked example
Asked why the returned cave prisoner is ridiculed, do not answer "because people fear the truth". Show the epistemic structure: the prisoner has moved from eikasia to noēsis, the shadows are the sensible world and the sun the Form of the Good. Ridicule follows because the philosopher's claims are measured against doxa by people still inside the cave; education is a turning (periagōgē) of the soul, not the transfer of information. Then note the political consequence: ruling requires the knowledge only the returned philosopher has.
Traps that cost marks
- Calling a Platonic Form a "mental idea" - it is mind-independent.
- Making Aristotle's form separable from matter.
- Confusing efficient cause (what produces) with final cause (for the sake of which).
- Assigning "virtue is knowledge" to Aristotle, or the doctrine of the mean to Plato.
- Reducing the cave to politics: it is epistemological, educational and political at once.