Suppose someone were to declare as they began eating their meal: "This food is poisoned and will kill me if I eat it [as they continue to eat it] and I have no wish to die". They further declare, truthfully, that they are not being coerced into eating the food, nor do they feel compelled to do so; yet still they consume the food. Is this an example of an irrational act? If so, what makes it irrational? If not, why not?