Thank you polyglot!
Heidegger and Derrida were both disciples of Nietzsche, who was a philologist... Heidegger's concept of "Destruction" which Derrida calls "Deconstruction" both make direct/indirect references to philology. For example: 'Christmas Eve' and 'Noche Buena' (Good Night) are words that have nothing in common with each other, yet for all intense and purposes mean the same thing. Nietzsche felt that people would be told something and typically believe it without questioning it, because, of religious and/or social conditioning. Heidegger takes this concept further than Nietzsche ever did with his concept of 'Dasein', but Derrida actually takes it even further than Heidegger did..., I don't think Heidegger is it...
Thanks again and Best Regards,