Teacher:In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Teacher: Now, understand the problem? Solve this instance: A Horn clause with exactly one positive literal is a definite clause or a strict Horn clause ; a definite clause with no negative literals is sometimes called a unit clause , and a unit clause without variables is sometimes called a fact ; and a Horn clause without a positive literal is sometimes called a goal clause ( note that the empty clause consisting of no literals is a goal clause ) .
Student:
A Horn clause with exactly one positive literal is a definite clause ; a definite clause with no negative literals is sometimes called a " fact " ; and a Horn clause without a positive literal is sometimes called a goal clause .