If you present a prediction implausibly, with no indication of why you'd want to predict such a thing or how, an 'able to manipulate the cards' interpretation may well seem more likely (even more dramatically congruent and appealing). I agree that smart-assery (and complacency and egotism) are more closely tied to you than to particular effects.
There are lots of ways to present the effect-structure of events or decisions matching a pre-existing record. Different modes of divination and precognition (dream-prophecy, Docc Hilford's 'Dream of May'), participant's actions as a twice-told repetition of former events, or unconscious spirit-possession, mental time travel (Bruce Bernstein's A Matter of Time), thoughts matching an externally existing imaginative reality (as in Christopher Taylor's 'Being There'), different sorts of non-causal correspondences, poetic echoes, astral-magical influence . . .