This is why ambiguity, although it alone makes choice possible, always remains present in choice itself.
Maurice Blanchot, Two Versions of the Imaginary

The sceptic seeks to suspend the binary logic of exclusive options by revealing that one option is no more true than the other. The friend is no more a friend than the foe is a foe. And that the one "who is not for us" is not necessarily the one "who is against us". This way the sceptic tries to step back from the choice, play for time and thus sabotage the mechanism by which power is enforced.
Jan Verwoert on Giorgio Agamben's essay Bartleby, or On Contingency