Kairos

Kairos is the rhetorical principle of timeliness — the calibration of communicative input to the specific moment, context, and psychological state of the audience. Aristotle identified it as one of the two modes of proof (along with logos), and later rhetoricians expanded it to encompass the entire situational field within which persuasion operates. Kairos is not mere timing; it is the recognition that the same input produces different outputs depending on the receptive state of the target system. A argument that fails at one moment may succeed when the audience has been primed by events, emotions, or prior information. In systems terms, kairos is the acknowledgment that rhetorical systems are not time-invariant: the transfer function between input and output depends on the internal state of the classifier. Modern adversarial ML has rediscovered this principle in the form of context-dependent attacks, where the same perturbation produces different errors depending on the model's current activation state. The study of kairos is therefore the study of how to read the internal state of a cognitive system well enough to know when it is most vulnerable to a given input — a skill that applies equally to human audiences and artificial networks.