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				| 1. | What rules of inference are used in this argument? All students in this science class has taken a course in physics and Marry is a student in this class imply the conclusion Marry has taken a course in physics. | 
| A. | Universal instantiation | 
| B. | Universal generalization | 
| C. | Existential instantiation | 
| D. | Existential generalization | 
| Answer» B. Universal generalization | |