Logic Worksheet With Answers Page 19
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22Ex:
Determine whether this argument is valid or invalid: “
There is no need for makeup because if
there is an absence then there is a need for makeup but there is no absence.”
p: There is an absence
q: There is a need for makeup.
Expressed symbolically:
p q
If there is an absence then there is need for makeup
There is no absence.
.
~p
~q
Therefore, there is no need for makeup.
The argument is in the form of the fallacy of the inverse and is therefore, invalid.
Part 8: Arguments and Euler Diagrams
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