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12050 | Substances contain a source of change or principle of activity [Wiggins] |
Full Idea: Substances are things that have a source of change or principle of activity within them. | |
From: David Wiggins (Substance [1995], 4.4.1) | |
A reaction: A vey significant concession. I think we can talk of 'essences' and 'powers', and drop talk of 'substances'. 'Powers' is a much better word, because it immediately pushes the active ingredient to the forefront. |