It is not zero there, it is an empty set symbol as it is impossible to measure something if you do not have a scale of measurement.
You are somewhat right. If fundamental “ought” turns out not to exist an agent should fallback on given “ought” and it should be used to calculate expected value at the right column. But this will never happen. As there might be true statements that are unknowable (Fitch’s paradox of knowability), fundamental “ought” could be one of them. Which means that fallback will never happen.
It is not zero there, it is an empty set symbol as it is impossible to measure something if you do not have a scale of measurement.
You are somewhat right. If fundamental “ought” turns out not to exist an agent should fallback on given “ought” and it should be used to calculate expected value at the right column. But this will never happen. As there might be true statements that are unknowable (Fitch’s paradox of knowability), fundamental “ought” could be one of them. Which means that fallback will never happen.