Solution to (4) Find a common domain for the variables x, y, and z for which the … - Sikademy
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Archangel Macsika

(4) Find a common domain for the variables x, y, and z for which the statement ∀x∀y((x=/=y) => ∀z((z=x)v(z=y))) is true and another domain for which it is false.

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It is true on every set with no more than 2 members and false on other sets.

For example, it is true on \{a,b\} and false on \mathbb R

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Question ID: mtid-5-stid-8-sqid-3739-qpid-2438