7. Write an instance of definition of a term by Genus and Differentia. 8. Define the term "pencil" by violating one of the lexical rules- one which is too broad

7. An instance of definition of a term by Genus and Differentia is: "A horse is an animal that has four legs, a tail, and a mane." Here, "animal" is the genus, and "has four legs, a tail, and a mane" is the differentia that distinguishes a horse from other animals.<br /><br />8. If we define the term "pencil" by violating one of the lexical rules and making the definition too broad, it could be: "A pencil is a writing instrument." This definition is too broad because it includes other writing instruments like pens, crayons, and markers, which are not considered pencils. A more accurate definition would be: "A pencil is a writing instrument made of wood and graphite."