Celsus stated that there were two general bases,
concerned with the question whether a thing is,
other with the question of what kind it is.
He included definition
under the first of these, because
enquiry may equally be made as to whether sacrilege
has been committed, when a man denies that he
has stolen anything from a temple, and when he
admits that he has stolen private money from a
temple. He divides quality into fact
and the letter
of the law.
Under the head of the letter of the law
places four classes, excluding questions of competence:1 quantity
he places under the
head of conjecture.2