Clear all
Work #1839

Fragments and Testimonia

Speusippus
c. 347–339 BCE · Attic Greek
Prose treatises (fragmentary — surviving in Aristotle, Proclus, Iamblichus, Athenaeus) · Academic Platonism / Pythagorean-Platonic synthesis

The One is not the Good — mathematical entities, not transcendent Forms, are the primary realities

Attribute Fingerprint

Rows where works disagree are highlighted in gold. The full ontology grid is shown.

Attribute Fragments and Testimonia
Time · Extent Infinite
Time · Ontological Status Substantival
Time · Grain Continuous
Time · Freedom Deterministic
Time · Traversability Linear
Time · Dimensionality One
Time · Direction Uni-directional
Space · Extent Finite
Space · Ontological Status Substantival
Space · Curvature Implicit
Space · Dimensionality Three
Space · Locality Local
Matter · Extent Finite
Matter · Ontological Status Relational
Matter · Conservation Conserved
Matter · Dimensionality Three
Matter · Locality Local
Observer · Time Instance Single
Observer · Space Instance Single
Observer · Knowledge Extent Mediated
Observer · Knowledge Retainment Total
Observer · Physicality Both
Observer · Agency Active
Observer · Number Plural
Observer · Metaphysical Agency Cosmic-ordering
Observer · Moral Authority Reason
Observer · Theological Method
Energy · Extent Finite
Energy · Ontological Status Relational
Energy · Conservation Conserved
Energy · Dispersibility not engaged
Information · Ontological Status Substantival
Information · Cosmic Conservation Conserved
Information · Personal Conservation Conserved
Information · Granularity Discrete

Dimension-by-Dimension Evidence

What each work's passages reveal about its stance on each of the six dimensions.

Time

Fragments and Testimonia

Time is linear and substantival. Mathematical principles are eternal and necessary but "in" the cosmos, not in a separate realm. The temporal world is less fundamental than mathematical structure.

Space

Fragments and Testimonia

Space is finite (the bounded Greek cosmos) and emerges at the level of geometrical magnitudes — the second tier of Speusippus's ontological hierarchy (after numbers).

Matter

Fragments and Testimonia

Matter is relational: its ultimate constituents are mathematical structures. The One and the indefinite dyad generate numbers; numbers generate magnitudes; magnitudes generate physical bodies.

Observer

Fragments and Testimonia

The observer is both embodied and partly disembodied: the soul has a mathematical nature not reducible to body. "Scientific perception" (epistēmonikē aisthēsis) bridges sense and intellect.

Energy

Fragments and Testimonia

Energy, like matter, is a manifestation of mathematical structure. Conserved and finite within the bounded cosmos. Dispersibility is unaddressed in the surviving fragments.

Information

Fragments and Testimonia

Number is the fundamental informational unit — substantival, discrete, and conserved. Mathematical structure is more basic than matter. Personal information is conserved through the soul's mathematical nature.

Internal Tensions

Where each work's argument pulls against itself.

Fragments and Testimonia

The governing tension: by positing separate principles for each level of reality, Speusippus risks making the universe "episodic, like a bad tragedy" (Aristotle, Metaphysics 1075b37). What unifies numbers, magnitudes, and soul if there is no single supreme principle (the Good, the One-as-Good) to hold them together? Whether Speusippus had an answer is lost with his writings.