Coscott comments on Functional Side Effects - Less Wrong Discussion
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Comments (18)
Your action is probably dependent only on the output of the Omega function (including its output in counterfactual worlds).
Your action is not dependent only on the output of the function in the actual world.
We can model it as an effect of the function, but not as an effect of the output. I noticed this, which is why I put in the statement:
If we define side effect as relative to the one output of the function, then both examples are side effects. If we define side effect as relative to the entire function, then only the second example is a side effect.
Actually, I take that back, I think that both examples are side effects. Your output is a side effect of the Omega function, because it is not just a dependent on what Omega does on different inputs, it is also dependent on what Omega does in counterfactual universes.
I am confused by this issue, and I am not trying to present a coherent solution as much as I am trying to stimulate discussion on thinking outside of the input-output model of decision theory.