Determine whether the given argument is valid. For the valid argument, construct a formal proof. n. If it rains, I will watch movies at home. If it does not rain, I enjoy myself in the park....

Determine whether the given argument is valid. For the valid argument, construct a formal proof.

Extracted text: n. If it rains, I will watch movies at home. If it does not rain, I enjoy myself in the park. Therefore, either I will watch movies at home, or I enjoy myself in the park.