Written in a somewhat fake wisdom manner, without reading other replies:
If you chose a different card, would he not say a different card’s name? Therefore, the card he says is causally linked to your choice of card. And would you not hear different words if he said something different? Therefore, your observations are causally linked to the card he says. Just because we do not know how something works – nay, even if it is Unknowable™ – that doesn’t make it causally unshackled from reality.
Written in a somewhat fake wisdom manner, without reading other replies:
If you chose a different card, would he not say a different card’s name? Therefore, the card he says is causally linked to your choice of card. And would you not hear different words if he said something different? Therefore, your observations are causally linked to the card he says. Just because we do not know how something works – nay, even if it is Unknowable™ – that doesn’t make it causally unshackled from reality.