• The consequences of an act affect the probability of its occurring again.

• The 50-50-90 rule: Anytime you have a 50-50 chance of getting something right, there's a 90% probability you'll get it wrong.

• The probability of life originating from accident is comparable to the probability of the unabridged dictionary resulting from an explosion in a printing shop.

• ### Medicine is a science of uncertainty and an art of probability.

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• Statistically, the probability of any of us being here is so small that you'd think the mere fact of existing would keep us all in contented dazzlement of surprise.

• The probability that we may fail in the struggle ought not to deter us from the support of a cause we believe to be just.

• The scientific imagination always restrains itself within the limits of probability.

• The fact that I have no remedy for all the sorrows of the world is no reason for my accepting yours. It simply supports the strong probability that yours is a fake.

• From principles is derived probability, but truth or certainty is obtained only from facts.

• Fourth Law of Thermodynamics: If the probability of success is not almost one, then it is damn near zero.

• Psychology helps to measure the probability that an aim is attainable.

• Should the States reject this excellent Constitution, the probability is, an opportunity will never again offer to cancel another in peacethe next will be drawn in blood.

• ### Legends of prediction are common throughout the whole Household of Man.

Gods speak, spirits speak, computers speak. Oracular ambiguity or statistical probability provides loopholes, and discrepancies are expunged by Faith.

• Fame, we may understand, is no sure test of merit, but only a probability of such; it is an accident, not a property of man.

• The new always happens against the overwhelming odds of statistical laws and their probability, which for all practical, everyday purposes amounts to certainty; the new therefore always appears in the guise of a miracle.

• Some people are under the impression that all that is required to make a good fisherman is the ability to tell lies easily and without blushing; but this is a mistake. Mere bald fabrication is useless; the veriest tyro can manage that. It is in the circumstantial detail, the embellishing touches of probability, the general air of scrupulous -- almost of pedantic -- veracity, that the experienced angler is seen.

• The laws of probability, so true in general, so fallacious in particular.

• ### Do not expect to arrive at certainty in every subject which you pursue.

There are a hundred things wherein we mortals. . . must be content with probability, where our best light and reasoning will reach no farther.

• I think if our students, if our high school students - if all of the American citizens - knew about probability and statistics, we wouldn't be in the economic mess that we're in today.

• ### Only in Britain could it be thought a defect to be too clever by half.

The probability is that too many people are too stupid by three-quarters.

• In the financial system we have today, with less risk concentrated in banks, the probability of systemic financial crises may be lower than in traditional bank-centered financial systems.

• Let me state what the official IPCC prediction is: Sea levels could go up as much as three-quarters of a meter in this century, but there is a reasonable probability it could be much higher than that.

• When you turn from one room to the next, when your animal senses no longer perceive the sounds of the dishwasher, the ticking clock, the smell of a chicken roasting - the kitchen and all its seemingly discrete bits dissolve into nothingness - or into waves of probability.

• If scientific reasoning were limited to the logical processes of arithmetic, we should not get very far in our understanding of the physical world. One might as well attempt to grasp the game of poker entirely by the use of the mathematics of probability.

• We can say with certainty - or 90% probability - that the new industries that are about to be born will have nothing to do with information.

• ### Probability is expectation founded upon partial knowledge.

A perfect acquaintance with all the circumstances affecting the occurrence of an event would change expectation into certainty, and leave nether room nor demand for a theory of probabilities.

• ### Information: the negative reciprocal value of probability.

• and realized that death was not only a permanent probability, as he had always believed, but an immediate reality.

• Free yourself from the rigid conduct of tradition and open yourself to the new forms of probability.

• The fact that we don't keep repeating tests in the same arena is not because the probability of the hypothesis showing its falsity in other arenas goes up after it has passed tests in one arena.

• One important measurement issue concerns the fat tails problem that I mentioned earlier. VAR is concerned with extreme outcomes. If the tails of the probability distributions we are using are too thin, our VAR measures are likely to be too low.

• I'm trying to construct a world that maximises the probability that SpaceX continues its mission without me.

• If we have an atom that is in an excited state and so is going to emit a photon, we cannot say when it will emit the photon. It has a certain amplitude to emit the photon at any time, and we can predict only a probability for emission; we cannot predict the future exactly.

• We think that life develops spontaneously on Earth, so it must be possible for life to develop on suitable planets elsewhere in the universe. But we don't know the probability that a planet develops life.

• If we look at the way the universe behaves, quantum mechanics gives us fundamental, unavoidable indeterminacy, so that alternative histories of the universe can be assigned probability.

• In the U.S.A. or Europe there is no realistic way to estimate the type, magnitude, or probability of the risk, nor any way to narrow down the potentially affected regions.

• In trials of fact, by oral testimony, the proper inquiry is not whether is it possible that the testimony may be false, but whether there is sufficient probability that it is true.