Problem
Explain and elaborate on the philosopher's stance or point of view on the subject at hand (making any pertinent linkages to the philosopher's larger principles or to the wider debate, as appropriate). Include the major ideas and be specific. Consider the possibilities you have to demonstrate your understanding in your responses. Making note of pertinent connections between responses is advised.
Berkeley on:
i. Primary vs. secondary qualities
ii. Substratum
iii. The likeness principle
iv. Knowledge of spirits
v. The illusion objection.