Answer
The original argument in words for the contrapositive reasoning is if the grass is not wet then it is not raining.
Work Step by Step
Let p and q represent two simple statements.
p : if it is raining.
q : the grass is wet.
Therefore,
It is a conditional statement the grass is wet dependent on a condition when it is raining.
Contrapositive reasoning form is interchanged between the hypothesis and a conclusion of a conditional statement and negating both.
Its contrapositive reasoning form is:
\[\begin{align}
& \underline{\begin{align}
& p\to q \\
& \text{ }\sim p \\
\end{align}} \\
& \therefore \sim q \\
\end{align}\]
Hence, the original argument in words for the contrapositive reasoning is if the grass is not wet then it is not raining.