Final answer:
The given argument form is an invalid form of reasoning called a false dichotomy. It assumes that there are only two options, A and B, and concludes that if one option is not true, then the other option must be true.
Step-by-step explanation:
The given argument form is an invalid form of reasoning called a false dichotomy. It assumes that there are only two options, A and B, and concludes that if one option is not true, then the other option must be true. However, this is not a valid inference because there could be other possibilities or options that haven't been considered. Here is an example: