Of course, the reason why how much X1 likes Y is correlated with how much X2 likes Y is not telepathy—it’s that certain causal influences act on both. So, even if you know how much Xi likes Y for all i, there are questions left to ask.
Of course, the reason why how much X1 likes Y is correlated with how much X2 likes Y is not telepathy—it’s that certain causal influences act on both. So, even if you know how much Xi likes Y for all i, there are questions left to ask.