Analyze the following arguments and tell whether they are valid and sound:
1) 1. if missy is a cat , then she is a mammal.
2. missy is not a mammal.
3. therefore, missy is not a cat.
2) 1. if fido is a dog, then he is a mammal.
2. fido is a dog.
3. therefore, he is a mammal.
3) 1. if fido is a dog then he is a mammal.
2. fido is not a dog.
3. therefore, fido is not a mammal.

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.

can you explain it better