An expert system inferences based on probability. its

working memory $=\{$rain$(0\mathrm{.}7),$ cold$(0\mathrm{.}9)\}$

production rules $=$

$\{$ stayHome$($p$1\backslash$times p$2)$ rain$($p$1)$ cold$($p$2)\}$

At the end of data$-$driven inference, its working memory will become