What is a beast-day 1

What Is a Beast?
The definition of a “beast” has caused controversy for centuries. Though this might surprise some first-time students of Magizoology, the problem might come into clearer focus if we take a moment to consider three types of magical creature. 
 
Werewolves spend most of their time as humans (whether wizard or Muggle). Once a month, however, they transform into savage, four-legged beasts of murderous intent and no human conscience. 
 
The centaurs’ habits are not humanlike; they live in the wild, refuse clothing, prefer to live apart from wizards and Muggles alike, and yet have intelligence equal to theirs. 
 
Trolls bear a humanoid appearance, walk upright, may be taught a few simple words, and yet are less intelligent than the dullest unicorn, and possess no magical powers in their own right except for their prodigious and unnatural strength.