 To illustrate calculation of an act’s expected utility using basic intrinsic desires and aversions, suppose that an agent has no basic intrinsic aversions and just two basic intrinsic desires, one for health and the other for wisdom. The utility of health is 4, and the utility of wisdom is 8. In the formula for expected utility, a world covers only matters about which the agent cares. In the example, a world is a proposition specifying whether the agent has health and whether he has wisdom. Accordingly, there are four worlds:  \[ \begin{align} H  \amp W, \\ H   \amp {\sim}W, \\ {\sim}H   \amp  W, \\ {\sim}H   \amp {\sim}W.\\ \end{align} \]    Suppose that \(A\) is equally likely to generate any world. Using worlds,   \[ \begin{align} \textit{EU} (A) &amp; = P(A \gt(H \amp W))\util (H \amp W) \\ &amp;\qquad + P(A \gt(H \amp{\sim}W))\util (H \amp{\sim}W) \\ &amp;\qquad + P(A \gt({\sim}H \amp W))\util ({\sim}H \amp W) \\ &amp;\qquad + P(A \gt({\sim}H \amp{\sim}W))\util ({\sim}H \amp{\sim}W) \\ &amp; = (0.25)(12) + (0.25)(4) + (0.25)(8) + (0.25)(0) \\ &amp; = 6.\\ \end{align}  \]    Using basic intrinsic attitudes,  \[ \begin{align} \textit{EU} (A) &amp;= P(A \gt H)\util (H) + P(A \gt W)\util (W) \\ &amp; = (0.5)(4) + (0.5)(8) \\ &amp; = 6. \end{align} \]   The two methods of computing an option’s utility are equivalent given that, under supposition of an act’s realization, the probability of a basic intrinsic desire’s or aversion’s realization is the sum of the probabilities of the worlds that realize it.