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🚧 Setup for 6.4

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chapter_6/test_yourself.md
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@ -114,3 +114,23 @@ cite the property from 6.2.2 used
stated.
exactly
---
Page 445
**Test Yourself**
1. In the comparison between the structure of the set of statement forms and the
set of subsets of a universal set, the _or_ operation $\vee$ corresponds to
_____, the _and_ operation $\wedge$ corresponds to _____, a tautology
$\mathbf{t}$ corresponds to _____, a contradiction $\mathbf{c}$ corresponds
to _____, and the negation operation, denoted $\neg$, corresponds to _____.
2. The operations of $+$ and $\cdot$ in a Boolean algebra are generalizations of
the operations of _____ and _____ in the set of all statement forms in a
given finite number of variables and the operations of _____ and _____ in the
set of all subsets of a given set.
3. Russell showed that the following proposed "set definition" could not
actually define a set: _____.