RE: la condition de possibilite

It appears a number of times. See, for example, p. xxi-xxii of the English,
p. 13 of the French

There is a discussion of the way it is used in Kant, Nietzsche, Heidegger
and Foucault in my book Mapping the Present. The crucial thing in Nietzsche,
the later Heidegger and Foucault is that the Kantian question is made
historical.

Best wishes

Stuart

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