The absence of Truth cannot be compensated with formal logic. Otherwise, every logical construct could be considered truthful. When the truth is replaced with logic, what we get is fascism.
In order to preserve our intellectual honesty and integrity, we should re-evaluate our basic ideas and beliefs every once in a while. Otherwise, life becomes too calculated and predictable.
What if we (humans, life in general) are just a temporary infection in some other (incognizable to us) system? And what if that infection is just about to be eradicated? What are our options?
From some lame-ass movie: “People need someone to love. If you can’t give them that, give them something to hope for. If that’s not possible, either, give them something to – do”. This is the essence of civilization.