 One school of thought—which includes many influential Kant scholars, and is sympathetically represented in Allison 1990 (Chs. 12 and 13)—sees a fundamental change in Kant’s thought here. Whereas Part III of the Groundwork seems to give a “deduction” (justification) of freedom, in the second Critique Kant sees that this project is impossible on his own premises. So he stops argument short by appealing to a supposedly indubitable fact. Others emphasize the clear continuities between the two works—in particular, Kant’s continued reliance on common moral consciousness. For example, Łuków 1993 emphasizes the parallel between the role played by Achtung (“respect” or “reverence” for morality) and the fact of reason. Kant refers to reverence in all his ethical writings: it is the only “feeling self-wrought by a rational concept [= the moral law]” (4:401n). As such, it clearly parallels what he now calls “the sole fact of pure reason” (5:31). (See also O’Neill 2002 and Timmermann 2010.)