Assignment 4

1.

Use symbols to write the logical form the argument given below and then determine whether the argument is valid

If Henry ate his lunch, then Henry is not hungry

Henry is hungry

2.

Use a truth table to determine whether the

following argument is valid.

p q r

q p r

p r

3.

Using the valid argument forms, show that the argument is valid:

~ p q

r p

~ r s

s t