claim: global warming ceased around the end of the twentieth century and was followed (since 1997) by 19 years of stable temperature.
evidence: {\displaystyle Y(\omega )={\begin{cases}1,&{\text{if }}\omega ={\text{heads}},\\[6pt]0,&{\text{if }}\omega ={\text{tails}}.\end{cases}}} If the coin is a fair coin, Y has a probability mass function f Y {\displaystyle f_{Y}} given by: f Y ( y ) = { 1 2 , if  y = 1 , 1 2 , if  y = 0 , {\displaystyle f_{Y}(y)={\begin{cases}{\tfrac {1}{2}},&{\text{if }}y=1,\\[6pt]{\tfrac {1}{2}},&{\text{if }}y=0,\end{cases}}} A random variable can also be used to describe the process of rolling dice and the possible outcomes.