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Sense/Cavell: "Recognition" is a category, an existential, with whose help a statement about suffering is given a sense.
The recognition of the existence of the external world does not imply a separate, detached relationship from the knowledge to the other, with which one could disprove skepticism.
The necessity to acknowledge invites rather to the possibility of denying than to repel it!
Die Unheimlichkeit des Gewöhnlichen Frankfurt 2002