[m000]

I am hungry and there's some leftover pizza in the fridge. Do I really need to eat it?

[mannykannot]

I think the author's premise would lead to the conclusions that you really are hungry and you really eat the pizza, but the former is not causal in the latter (they are just theorems of the formalism) and the latter is not causal in anything else.

[lacrimacida]

Your mirror universe dolppelganger may eat it first