Older than 26
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Ambiguity and modals. The following sentences are ambiguous out of context. For each of them indicate the two meanings they can express, choosing from: epistemic necessity, non-epistemic necessity, epistemic possibility, epistemic impossibility, ability, permission, mere possibility, prohibition.
As you do this, try to think of a paraphrase or context that helps to render explicit the two different readings.
1. You can't be older than 26.
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2. She should be in her room.
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3. Jennifer can swim again.
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4. You must be at least 20.
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5. She may stay a bit longer.
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6. He could have got out through the window.