Knowledge that comes from secondary qualities does not provide objective facts about things.

The secondary qualities of things not discovered by demonstration.

Because we know not the real constitutions of substances, on which each secondary quality particularly depends.

He takes heat as an example of a secondary quality.

They must be what Robert Boyle later called 'secondary' qualities.

Locke, for example, claimed that color was at the head of his list of secondary qualities.

Paul clarifies this distinction through the use of primary and secondary qualities.

Therefore, primary qualities, like secondary qualities, exist only in the mind.

Now the black section has acquired secondary negative qualities through association with the shock.

For example, a shadow is a secondary quality.