Ideas of Walter Burley, by Theme

[English, 1275 - 1345, Scholastic theologican who spent 17 years in Paris.]

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9. Objects / E. Objects over Time / 6. Successive Things
Days exist, and yet they seem to be made up of parts which don't exist
Unlike permanent things, successive things cannot exist all at once
12. Knowledge Sources / B. Perception / 2. Qualities in Perception / c. Primary qualities
The primary qualities are mixed to cause secondary qualities