 The earlier Essay was a less radical work. Though it sought to explain how the cognitive faculties are developed as a consequence of sensation, it took sensation itself largely for granted. Condillac explicitly rejected the views that the mind can make judgments that it is not aware of, and that we can confuse the products of inferential operations with immediately given sensations. As a consequence, he maintained, in opposition to Molyneux, Locke, and Berkeley, that we do not need to learn to perceive visual depth. However, the Essay was also more wide-ranging than the Treatise. It devoted attention to the development of language and its role both in the acquisition of our more sophisticated cognitive powers and in the generation of false philosophies. These are topics that Condillac later relegated to his works on logic.