The combination οὐ μή creates the strongest negative in Greek, used either to emphatically deny something will happen or to prohibit an action. In denial, it most commonly takes the aorist subjunctive ('will certainly not be captured by deceit'). Occasionally the present subjunctive appears with verbs of possibility or ability. Some scholars trace certain uses to ellipsis of an expression of fear or apprehension. The construction conveys absolute negation with rhetorical force.