 Finally, the swerve may do nothing more than fulfill the function, described above, that Cicero gives to it in On Fate—because of the swerve, statements about what will happen in the future are, at present, neither true nor false. And so, what will happen is not inevitable, and our deliberations about what to do and our actions are not futile (O’Keefe 2005). This fits with Lucretius’ description of how determinism threatens our libera voluntas—if each motion were linked to a prior motion from eternity, animals would not be able to do what they want to do and to advance wherever pleasure leads them. So the swerve is not directly involved in the production of free action, it simply helps dispose of one threat to our freedom, the one spelled out by the fatalist argument: if the Principle of Bivalence were true, and applied to statements about the future, the future would be necessitated, and we would be helpless.