Noun

The state of being certain.

* Fisher Ames

The certainty of punishment is the truest security against crimes.

An instance of being certain.

A fact or truth unquestionably established.

* November 2 2014 , Daniel Taylor, " Sergio Agüero strike wins derby for Manchester City against 10-man United," guardian.co.uk

Yet the truth is that City would probably have been coasting by that point if the referee, Michael Oliver, had not turned down three separate penalties, at least two of which could be accurately described as certainties .

* 1824 , (Walter Savage Landor), Imaginary Conversations Volume 1

Certainties are uninteresting and sating.

Noun

(predictabilities)

The characteristic of being predictable.

* {{quote-web

, year = 2013 , author = The Royal Swedish Academy of Sciences , title = Trendspotting in Asset Markets (Prize in Economic Sciences / Popular Science Background) , site = nobelprize.org , url = http://www.nobelprize.org/nobel_prizes/economic-sciences/laureates/2013/popular-economicsciences2013.pdf , accessdate = 2013-10-20 }}

There are several ways to approach predictability'. One way is to investigate whether asset prices over the past few days or weeks can be used to predict tomorrow’s price. The answer is no. Following a large amount of careful statistical work by Fama in the 1960s, researchers now agree that past prices are of very little use in predicting returns over the immediate future. [...] An implication of the excessive swings in stock prices is that a high ratio of price relative to dividends in one year will tend to be followed by a fall in prices relative to dividends over subsequent years, and vice versa. This means that returns follow a predictable pattern in the longer run. Shiller and his collaborators demonstrated such ' predictability in stock markets as well as bond markets, and other researchers have later confirmed this finding in many other markets.