Chapter 7, Encapsulation
The examples shown so far do not describe how to store those instances.
Either "instances" should be "attributes" or the sentence makes no sense to me
Chapter 7, Polymorphism
A Cheese object may have an age() method that lets you determine how long to stow $cheddar so that it becomes sharp
I'm not a native english speaker, but this only became clear after reading on, because 'determine' also has a meaning of ascertain, i.e. "I determined the length of a day to be 10 hours on this planet". Maybe 'decide' or 'define' are less ambiguous.
UPDATE: Chapter 7, Blessed References
An class representing basketball players
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