Ideas of Pyrrho, by Theme

[Greek, 365 - 270 BCE, Born in Elis, Greece. Taught by Bryson, and by Anaxarchus of Abdera.]

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1. Philosophy / D. Nature of Philosophy / 1. Philosophy
He studied philosophy by suspending his judgement on everything [Diog. Laertius]
2. Reason / A. Nature of Reason / 9. Limits of Reason
Sceptics say reason is only an instrument, because reason can only be attacked with reason [Diog. Laertius]
13. Knowledge Criteria / A. Justification Problems / 1. Justification / a. Justification issues
If we need a criterion of truth, we need to know whether it is the correct criterion [Fogelin]
13. Knowledge Criteria / D. Scepticism / 1. Scepticism
The Pyrrhonians attacked the dogmas of professors, not ordinary people [Fogelin]
13. Knowledge Criteria / D. Scepticism / 6. Scepticism Critique
Academics said that Pyrrhonians were guilty of 'negative dogmatism' [Fogelin]
13. Knowledge Criteria / E. Relativism / 1. Relativism
Objects vary according to which sense perceives them (Mode 3) [Diog. Laertius]
Perception varies with madness or disease (Mode 4) [Diog. Laertius]
Judgements vary according to local culture and law (Mode 5) [Diog. Laertius]
Perception of objects depends on surrounding conditions (Mode 6) [Diog. Laertius]
Animals vary in their feelings and judgements (Mode 1) [Diog. Laertius]
Individuals vary in responses and feelings (Mode 2) [Diog. Laertius]
Perception is affected by expectations (Mode 9) [Diog. Laertius]
Perception varies with viewing distance and angle (Mode 7) [Diog. Laertius]
Perception of things depends on their size or quantity (Mode 8) [Diog. Laertius]
Perception and judgement depend on comparison (Mode 10) [Diog. Laertius]
26. Natural Theory / C. Causation / 7. Eliminating causation
There are no causes, because they are relative, and alike things can't cause one another [Diog. Laertius]
27. Natural Reality / A. Classical Physics / 1. Mechanics / a. Explaining movement
Motion can't move where it is, and can't move where it isn't, so it can't exist [Diog. Laertius]