Learning Activity 9
Determine which rule of inference is the basis for each of the argument below:
Antonio Luna is a scientist.
Therefore, either Antonio Lune or Jose Rizal is a scientist.
-Addition
What is the rule of inference that was used in the argument in #1
-Modus Ponens
Determine which rule of inference is the basis for each of the argument below:
Antonio Luna and Jose Rizal like Nelly Boustead.
Therefore, Antonio Lune likes Nelly Boustead.
-Simplification
Short Quiz 15
Determine whether each of the following arguments is valid or not.
a. If the solution turns blue litmus paper red, then the solution contains acid. The solution does not contain acid. So, the solution does not turn blue litmus paper red.
-Valid
b. If the solution turns blue litmus paper red, then the solution contains acid. The solution turns blur litmus paper red, so the solution contains acid.
-Valid
c. If you study hard, you refine your communication skills and build up your confidence. If you refine your communication skills build up your confidence, then your job opportunities increase. Hence, if you study hard, your job opportunities increase.
-Valid
d. Kidnapping is wrong if society disapproves of it. Kidnapping is wrong. So society disapproves of kidnapping.
-Invalid
e. If overeating causes disease, then it is not healthy. Overeating does not cause disease. So overeating is healthy.
-Invalid