According to a commonly held interpretation, Fichte, in the science of knowledge, revisits the problem which lies at the core of Kant's third Critique, with a view to solving it in his own way. This idea, perfectly legitimate in itself, is usually endorsed for questionable reasons. By scrutinizing some of Fichte's early writings and his correspondence, the present paper aims to determine the exact manner in which the young thinker interpreted Kant's critical philosophy and why he thought it necessary to complete Kant's work, particularly with regards to the Critique of Judgment.