Name ________________________   Logic Homework 3  Date ______________

Homework 3. For each of the following arguments, say whether it is valid or invalid. 

 	My monkey can fly. 
My monkey can fly.  	
1. ____________ 
  	
 	My monkey can fly. 
My monkey can not fly.  	
2. ____________ 
  	
 	My monkey can not fly.
My monkey can fly. 
My monkey can fly.	3. ____________ 	
 	My cat can not fly.
My dog can not fly.
My snake can not fly.
My rabbit can not fly. 
My monkey can not fly.	4. ____________ 	

If you have trouble, I suggest trying to draw pictures based on the following scheme 

                                              Fx : x can fly 
                                              m : my monkey 
                                              c : my cat 
                                              d : my dog 
                                              s : my snake 
                                              r : my rabbit

Question 5. Write out the correct definition of validity in your own words as completely as you can. Don't worry about making it elegant, just worry about getting it right. 

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