Full Idea
The remark of Heraclitus that all things are and are not effectively renders all assertions true, and that of Anaxagoras that there is an intermediary between assertion and negation makes all assertions false.
Gist of Idea
If everything is and isn't then everything is true, and a midway between true and false makes everything false
Source
comment on Heraclitus (fragments/reports [c.500 BCE]) by Aristotle - Metaphysics 1012a
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.108
A Reaction
Compare Idea 416. Heraclitus is discussing truth-value 'gluts', as in paraconsistent logic, and Anaxagoras is discussing truth-value 'gaps', as in three-valued Kleene logic.
Related Idea
Idea 416 Beautiful harmony comes from things that are in opposition to one another [Heraclitus]