The Cogito (n.) always already implied 'I am dead.'
The Cogito (n.) would be haunted at its root: its self-presence is the obsession of "es spukt."
The Cogito (n.) escapes madness only because it is valid even if I am mad, even if my thoughts are completely mad.
The Cogito (n.) is valid even for the maddest madman, yet to reflect it and keep it one must not be mad.
The Cogito (n.) means nothing, yet it has a very great value: the shattering blow of a style that asserts mastery.
The Cogito (n.) fathers even the least Cartesian thinking about animals: Kant, Heidegger, Levinas and Lacan descend from it by symptomatic disavowal.
Cogito (n.) of a finite creature reads: I think, therefore I need the other in order to think. Only a god can say: I think, therefore I suffice for myself.