Ideas from 'De modo distinguendi phaenomena' by Gottfried Leibniz [1685], by Theme Structure

[found in 'Leibniz Akademie Edition' by Leibniz,Gottfried (ed/tr [Berlin Akademie]) [Berline Akademie 1999,]].

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7. Existence / D. Theories of Reality / 1. Realism
If experience is just a dream, it is still real enough if critical reason is never deceived
The strongest criterion that phenomena show reality is success in prediction
12. Knowledge Sources / B. Perception / 2. Qualities in Perception / e. Primary/secondary critique
Light, heat and colour are apparent qualities, and so are motion, figure and extension