ABSTRACT
The arguments that we have so far considered are categorical, i.e. they consist of statements which, whether true or false, are categorical or unconditional. There is, however, another and very common type of argument that is partly conditional or hypothetical in character, such as the following :
If the tank is empty, the car will not start. It is empty, therefore the car will not start.
If this bookcase is less than seven feet high, it will pass through the study door. It is less than seven feet high, therefore it will pass through.
