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The sentence is: Of all the students, only Claire was angry at 3:00

Here is what I think it is: ∀x [(Student(x) ∧ Angry(x, 3:00)) → x=claire]

The textbook (LPL) uses these names and predicates for this specific sentence:

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1 Answer 1

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∀x [(Student(x) ∧ Angry(x, 3:00)) → x=claire]

Close.

This merely sais, "Any student who is angry at 3:00, is Clair." This may be satisfied when no student is angry then. It does not affirm that Clair is angry at 3:00, nor that she is a student.

You must say: "Clair is a student who is angry at 3:00, and any student who is angry at 3:00, is Clair."

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