To make sure that this group of people doesn't have
telepathic powers within it, they should all be
subject to longer tests, as this will confirm whether
they have telepathic powers or not.
A large limitation of this test was deciding whether
the results show if it is the sender, or the receivers
that were telepathic. This could be done by making the
receivers try and receive messages from a selection of
people, and analysing the results to find which people
were the best transmitters.
…
