It does so because what is grasped by intelligence is not fact but possibilities of unities or correlations. Judgment takes up the content of intelligence toward verification. It searches for the term of the inquiry. But, judgment is dependent upon both intelligence and experience. Thus, by taking up intelligence, it takes up experience as well.
Decision sublates judgment in moving the subject toward action.
While judgment of fact was concerned with being, decision is concerned with the making of being. Within the level of decision, the prior three levels are taken up toward a decision and action. Lonergan provides a clue to answering this question. He writes Secondly, it follows that the speculative intellect or pure reason is just an abstraction. Scientific or philosophic experiencing, understanding, and judging do not occur in a vacuum.