There is no such phenomenon as luck, there is only probability.
@snafupants
That's not the point though, think of it this way:
Probability exists,
Luck is an assumption, based on what humans judge as a good (lucky) or bad (unlucky) event - we can all perceive and form similar judgement (in terms of it being lucky or unlucky) when a good event happens and when a bad one does, e.g. if a piano were to fall from the sky and miss squishing me by an inch, we'd all agree I was lucky.
If probability exists,
then it is probable that a certain individual 'wins the lottery' more often than another individual, and that's what makes him/her lucky.
Probability is unpredictable relative to reality after-all.
Hope that made sense..
Indeed both the piano and lottery scenario can be explained by statistics. With the latter, all persons have the same (dismal) chance of winning "the big one," granted each person purchases one dissimilar ticket for the same lottery.
I actually would not agree that one were lucky by sidestepping an unlatched, freefalling piano. That presupposes that life is a good thing, which glaringly isn't the case whatsoever.
I would amend the opening of your luck definition ("luck is an assumption") by positing that luck is an erroneous human belief predicated on superstition buoyed by human ignorance in order to justify myriad irrational behaviors.
@snafupants
Yeah, I agree both scenarios can be explained by statistics. Although a person's odds of winning two independent lotteries twice in a row would significantly reduce, given controlled factors, and perhaps (according to you) it would be a matter of pure statistics to win both times (although the odds are highly improbable). It is here, when a person wins the lottery (apologies for the lottery paradigm, I do concur with your idea of it) twice in a row, is coined the term lucky; not by the universe, but from a person's perception of the unlikelihood of, for example, this scenario. I never did mean to give off the impression that the universe plays by luck. I'm saying that events are (most probably but not certainly) objective but are extremely interpretative and that, that is its nature.
Is that not extreme subjectivity?
Are you saying that life is a bad thing?
Or are you rationalizing morality and being nihilistic?
Alright, irrational behaviors such as what? Don't quite understand.
I do agree that luck is superstitious, but superstition could very well exist for a reason, a natural phenomenon. To disregard it would also be unjustified, until disproved, would it not? I'm just considering the existence of unexplained unseen external factors. That perhaps not everything can be explained 'rationally'.
I'd like to ask whether you believe in coincidences?
Wow, thanks for digging this up along with my completely useless response. For what it's worth, I recognized that these numbers were quinary almost immediately this time around.
Anyway, to answer the actual, since I apparently had no idea way back when:
Luck doesn't exist. Probability (probably) doesn't exist. Still waiting on the secrets of quantum physics to be unlocked for that one, but for now I assume it doesn't since that seems most philosophically sound to me.
Probability and luck are both human ideas that arise from the human inability to perceive reality as it is (ie. humans perceive reality as linear, causal change where, once one event has happened, that event cannot happen in the same way again), probability a result of the inability to see how exactly how the present will affect the future ('present' in relative terms of course), luck a result of probabilities perceived as having low likelihood of occurring, actually occurring.