Good arguments?

My wife told me last nite saying that " If you dont study for your exam you will failed"

To think about it , i feel that it is not a good arguments.
Because if i dont study i might still answered or i have my assignments to back me up.

Implicit conclusion and implicit premises, a good statement is like, If i dont do my assignments i will failed because assignments are main reason to fail in a paper in MMU. It consists of 50% marks and a must to submit assignments if not will not passed, therefore if I dont do my assignments i will failed.

Facts are important. However sometimes a person make a statement with premises but yet ask the person to resolve it by him or herself.
Luckily i did my assignments and i will say i have the chance of not failing.
=)