In this audio excerpt from the 2002 Toronto conference ('Other Testaments') Derrida critiques Heidegger's notions of 'revealability' ('Offenbarkeit') and 'revelation' ('Offenbarung')... Heidegger argues that the possibility for revelation is always preceded ontologically (and non-logically) by the more fundamental notion of revealability... for Derrida this ordering is not 'appropriate' - no one, including God, can foresee the coming of this radical event - it is always 'unpredictable' and impacts not only humans but God (e.g., the crucifixion) - such unpredictability undermines any phenomenological basis (the 'horizon'), including Heidegger's...