Comment by ndsipa_pomu

Telepathy in principle could be easily tested in well controlled experiments. However, so far every time that it has been tested with rigorous controls (e.g. James Randi type of scepticism as regular scientists can be easily fooled) it has disappeared. Now, that's not proof that it doesn't exist, but it is very strong evidence that it doesn't exist and it means that you cannot meaningfully say anything about the behaviour of telepathy except that there's no reason to think that it exists.