Given the task definition and input, reply with output. In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.

medieval philosophy in medieval europe , dialectics -lrb- also called logic -rrb- was one of the three original liberal arts collectively known as the trivium -lrb- the others were rhetoric and grammar -rrb-.
medieval european philosophy had three original liberal arts as a group known as trivium , and the others were rhetoric and grammar.