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
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
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
13. Knowledge Criteria / D. Scepticism / 1. Scepticism
The Pyrrhonians attacked the dogmas of professors, not ordinary people
13. Knowledge Criteria / D. Scepticism / 6. Scepticism Critique
Academics said that Pyrrhonians were guilty of 'negative dogmatism'
13. Knowledge Criteria / E. Relativism / 1. Relativism
Objects vary according to which sense perceives them (Mode 3)
Perception varies with madness or disease (Mode 4)
Judgements vary according to local culture and law (Mode 5)
Perception of objects depends on surrounding conditions (Mode 6)
Animals vary in their feelings and judgements (Mode 1)
Individuals vary in responses and feelings (Mode 2)
Perception is affected by expectations (Mode 9)
Perception varies with viewing distance and angle (Mode 7)
Perception of things depends on their size or quantity (Mode 8)
Perception and judgement depend on comparison (Mode 10)
26. Natural Theory / C. Causation / 7. Eliminating causation
There are no causes, because they are relative, and alike things can't cause one another
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