Thank you for the opportunity to help you with your question!
In his Book II Locke categorizes ideas into four groups
Ideas we get form a single sense. For example, sight or taste
Ideas we form from more than a single sense. For example, shape and sizes
ideas that emerge from reflections
ideas emergent from a combination of sense and reflection. For example pain , pleasure, unity and existence.
Solidity as a quality is emergent from a combination of sense and reflection making it a secondary quality, as it carries the power of that object to produce an idea of that quality in our minds. Thus, it can be separated from the mind. If solidity as a value does not exist as a value in a society we can't recognize it.
Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 19th, 2015
Did you know? You can earn $20 for every friend you invite to Studypool!