In reality, I would deny the statement about what can be don by his cousin. But for the purpose of this exercise, I would say that if there was truly no causal mechanism, you would have no basis for saying that it was true, because you would have no evidence for it. In fact, you wouldn’t even be aware of it. If your cousin can name my card, he does so through a causal mechanism of some kind.
In reality, I would deny the statement about what can be don by his cousin. But for the purpose of this exercise, I would say that if there was truly no causal mechanism, you would have no basis for saying that it was true, because you would have no evidence for it. In fact, you wouldn’t even be aware of it. If your cousin can name my card, he does so through a causal mechanism of some kind.