Empathy is the ability
with what other people feel.
In the extreme this means
your activity neurons start firing
as soon as you see an activity.
So we can actually
the activity of a total stranger.
This practical mechanism
is called mirror neuron.
It would be even more important to
find another mechanism:
How some mentally shared activity
can become actual shared activity.
One such mechanism is well known.
Isn’t it strange that there is no dictionary
where you can look up “moneypathy”.
(Translated by EG)