| Example Grammar |
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| • | Propositional
Logic: |
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| – | Sentence
® Proposition | Complex Sentence |
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| – | Proposition
® P | Q | R | … |
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| – | Complex
Sentence ® (Sentence) | Ø Sentence | |
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| Sentence
Connective Sentence |
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| – | Connective
® Ù | Ú | Þ | Û |
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| • | Ambiguity
not resolved by parentheses |
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| resolved
by precedence rules |
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