A consequentia may be a conditional proposition or the relationship between the antecedent and the consequent in a conditional proposition. It may be an argument or the relationship between the premiss and conclusion of an argument, which may be called, confusingly, 'a rational proposition'. Scholars disagree about the origins of the theory of consequences. The word 'consequentia' can be found in Boethius, who found its Greek equivalent in Aristotle, even though it does not there have the technical sense of a relation among propositions. Garlandus Compotista and Peter Abelard inherited much from Boethius, yet in many ways the two were rethinking his doctrine very carefully. For a sample of the difficulties encountered in later medieval attempts to formulate a satisfactory definition of a consequence, we can turn to the Pseudo-Scotus. The century of Walter Burley, William Ockham, John Buridan, and others was indeed a golden age of logic, in which the theory of consequences attained its mature form.