Full Idea
Every alteration in secondary qualities is caused by some alteration made in the primary qualities.
Gist of Idea
Changes in secondary qualities are caused by changes in primary qualities
Source
Giles of Orleans (On 'Generation and Corruption' [1270], I.6c)
Book Reference
Pasnau,Robert: 'Metaphysical Themes 1274-1671' [OUP 2011], p.465
A Reaction
Pasnau calls this the 'supervenience' thesis, here with the addition of causation. Was this doctrine retained by Locke and Boyle?