In a pure hypothetical syllogism:

A) only one premise is hypothetical, and the conclusion is also hypothetical
B) only one premise is hypothetical, and the conclusion is categorical
C) both premises are hypothetical, and the conclusion is also hypothetical
D) both premises are hypothetical, and the conclusion is categorical
E) neither premise is hypothetical, but the conclusion is hypothetical

In a pure hypothetical syllogism, both premises are hypothetical, meaning they are conditional statements with an "if...then" structure. The conclusion is also hypothetical, as it follows the same conditional structure. An example of a pure hypothetical syllogism is:

If it rains, then the ground will be wet.
If the ground is wet, then there must have been rain.
Therefore, if there is no rain, then the ground cannot be wet.