<P> Other more advance models include those based on Bayesian networks, which are causal probabilistic models commonly used for risk analysis and decision support . Based on this kind of mathematical modelling, Constantinou et al., have developed models for predicting the outcome of association football matches . What makes these models interesting is that, apart from taking into consideration relevant historical data, they also incorporate all these vague subjective factors, like availability of key players, team fatigue, team motivation and so on . They provide the user with the ability to include their best guesses about things that there are no hard facts available . This additional information is then combined with historical facts to provide a revised prediction for future match outcomes . The initial results based on these modelling practices are encouraging since they have demonstrated consistent profitability against published market odds . </P> <P> Nowadays sport betting is a huge business; there are many websites (systems) alongside betting sites, which give tips or predictions for future games . Some of these prediction websites (tipsters) are based on human predictions, but others on computer software sometimes called prediction robots or bots . Prediction bots can use different amount of data and algorithms and because of that their accuracy may vary . </P> <P> In politics it is common to attempt to predict the outcome of elections via political forecasting techniques (or assess the popularity of politicians) through the use of opinion polls . Prediction games have been used by many corporations and governments to learn about the most likely outcome of future events . </P> <P> Predictions have often been made, from antiquity until the present, by using paranormal or supernatural means such as prophecy or by observing omens . Methods including water divining, astrology, numerology, fortune telling, interpretation of dreams, and many other forms of divination, have been used for millennia to attempt to predict the future . These means of prediction have not been proven by scientific experiments . </P>

In science a prediction based on a theory is called a(n)