In order to decide which action to perform, we first need to measure happiness and predict the

future. But it is not feasible to measure and predict which action will produce the greatest

amount of pleasure, since we never have the complete information. Given the lack of

information, it is not possible for us to know the right action to perform in advance.

$2.$ It is impractical, since it seems to require us to engage in never$-$ending action; e$.$g$.$ a

volunteering for a good cause may always maximize the total happiness.

$3.$ The most serious problem is that it may prescribe us to act unethically