"Outcome of an event cannot be determined, as future events are randomly decided"- Stochastic Probability Theory.
Why do we always regret about our actions or mostly others reaction to our actions. Rather than thinking in all possible states, let us enjoy the moment, as "Every moment is a moment of choice,every hour is a destiny." Anyhow, future is going to decide one of the random reactions, to which we can either respond or ignore.
Till then lets make the cat alive, for it's not only the cat which gets killed out of curiosity but also our moments.