SOLUTION: ) Determine whether the argument is valid or invalid. A tree has green leaves or the tree does not produce oxygen. This tree has green leaves ----------- ----------- -----

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Question 178929This question is from textbook
: ) Determine whether the argument is valid or invalid.
A tree has green leaves or the tree does not produce oxygen.
This tree has green leaves
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therefore This tree does not produce oxygen.
This question is from textbook

Answer by Mathtut(3670)   (Show Source): You can put this solution on YOUR website!
A tree has green leaves or the tree does not produce oxygen.
This tree has green leaves
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\ This tree does not produce oxygen.
:
p=tree has green leaves. q=tree does not produce oxygen 
p   q   pvq 
t   t    t      tree has green leaves. tree does not produce oxygen 
t   f    t       tree has green leaves. tree produces oxygen 
f   t    t       
f   f    f
:
 since it is an "or" this argument is invalid

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