Enlightebment Reason and it`s Fragile Interior: Validity Claims and Norative Action, Immanent and Transcendent sources of Realism and it`s Critique through Kant nietzsche, Foucault and Deleuze. Derrida`s Radical Critique of Knowledge: Deconstruction, Singularity and Alterity, Identity Erasure; Subjectivity and Responsibilituy in Emmanuel Levinas and Derrida. Recovering the Text the and Meaning: Communicative Action of Habermas, Honneth`s Critique of Power, Lyotard`s Report on Knowledge. Indeterminacy of Meanings: Pragmatism of Richard Rorty, Internal realism of Hilary Putnam and Belief Revision in David Lewis. After the Subject: Otherness in Helen Cixous, Femininity in Luce Irigaray, Presence in Jean Luc Nancy. Critiquin natural and Human Sciences: Science as Praxis, Phenomenology of Natural Sciences, The Neo Heideggerian critique of Science as a Critical Enterprise.