No label defined (Q3665077)
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scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | No label defined |
scientific article |
Statements
1982
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alethic modal operators
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Diodorean definition of necessity
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Megarian definition
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T
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S4
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B
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S5
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conservative extensions
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tensed systems
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modal fragment
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