Indirect realism

What are sense-data?

• Mind-dependent appearances of objects

• The things that enable us to experience objects, e.g. light rays

• Properties or qualities of objects

Which of these is NOT an example of a primary quality?

• extension

• shape

• colour

• motion

Which of these is a secondary quality?

• number

• solidity

• temperature

• extension

What do primary and secondary qualities have in common?

• They are nothing like the objects themselves

• They are both perceived via sense-data

• They represent objects

Why might the concept of sense-data lead to scepticism about mind-independent objects?

• Primary qualities are experienced via sense data, so how can we know them objectively?

• Secondary qualities vary between people, as their perceptions are different.

• If all we experience are sense data, then how do we know there are mind-independent objects?

Why does Russell say there IS an external world?

• There is a common understanding of "physical object"

• People have similar sense-data

• That physical objects exist is the best hypothesis

According to Locke, what do we have no control over?

• memory

• perception

• imagination

Which of these is Trotter Cockburn's argument?

• Coherence of experience

• Involuntary nature of experience

• Mind-dependent ideas aren't like mind--independent objects

What would direct realists say is a major weakness in indirect realism?

• We don't all experience the same things

• The existence of objects is inferred

• Locke saying motion at an atomic level gives way to unreliable experiences.