Noun
The quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood.
That which is or appears probable; anything that has the appearance of reality or truth.
Likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. See 1st Chance, n., 5.
Source: Webster's dictionaryMedicine is a science of uncertainty and an art of probability. William Osler
A pinch of probability is worth a pound of perhaps. James Thurber
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 neither room nor demand for a theory of probabilities. George Boole
The probability that we may fall in the struggle ought not to deter us from the support of a cause we believe to be just; it shall not deter me. Abraham Lincoln
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. Andy Rooney
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. Vannevar Bush