if you were to discover that apples were twice as valuable, you could simply pretend that you instead received twice as many apples
No, because twice as many apples are not usually twice as valuable. This because utility functions are not linear.
You can kind of deal with uncertainty about utility by fudging expectations about outcomes but, trust me, it is the primrose path to hell.
If the utility function is the square root of the number of apples you could multiply the number of apples by four. The question is mainly about whether you can do that kind of adaption than about anything else.
No, because twice as many apples are not usually twice as valuable. This because utility functions are not linear.
You can kind of deal with uncertainty about utility by fudging expectations about outcomes but, trust me, it is the primrose path to hell.
If the utility function is the square root of the number of apples you could multiply the number of apples by four. The question is mainly about whether you can do that kind of adaption than about anything else.