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Doing Philosophy: An Introduction Through Thought Experiments, 2/e
Theodore Schick, Muhlenberg College
Lewis Vaughn

The Problem of Skepticism and Knowledge
Facing Reality: Perception and the External World

Essay Quiz



1

What is the difference between primary and secondary qualities?
2

How does Locke solve the problem of the external world?
3

How would Berkeley respond to the question, If a tree falls in the forest and no one is around to hear it, does it make a sound?
4

How does phenomenalism close the gap between appearance and reality?
5

Explain the confusion involved in Berkeley's assertion that it's impossible for something to exist unconceived.