Abstract the form from the content, listing the premises first and the conclusion last. Beside the abstracted argument, set up the skeleton of the argument, noting that premises must be true and the conclusion false. With a pencil, try substituting terms into the skeleton that result in all true premises and a false conclusion. All hamsters are creatures who like to eat carrots. All furry animals are creatures who like to eat carrots.
All dogs are animals .
All dogs are mammals . All animals are mammals . This is not the case. In logic, as a general rule, do not infer any more than what is given. But, if you want to be creative and use your own words keep in mind the sentences you construct must be clearly true or false, otherwise you haven't accomplished anything.