The world is full of causes and
effects. The wind blows and the trees sway. The wind blowing causes
the tree to sway. The wind is the causative agent. Now biologically
there is a strong adaptive reason for being able to recognize
causative agents. If you're a monkey and a tree branch moves it is
useful to be able to tell if the branch moved due to wind or if the
branch moved due to a snake or other predator.
Humans are really good at finding
causative agents. We'll even make them up. Most myths deal with
trying to provide causative agents for effects where we couldn't see
what caused the effect. Where did the wind come from? Wind is an
effect, effects have causes, and causes have agents. In ancient
times, humans didn't understand high pressure systems and would make
up myths about what caused the wind. And so we end up with Aeolus the
ruler of the winds in Greek mythology (as one example).
This is an example of what some
scientists would call a hidden causative agent. And humans are
the only creatures known to employ them. Maybe. I recently read about
a paper where some scientists were studying whether a species of crow
had a concept of a hidden causative agent.
The scientists had a structure where
the crows were able to sit and observe a stick. When a person went
behind a curtain the stick would move around and prevent the crow
from accessing some food. The crows understood this reasonably well.
There was a cause and effect, with the human as the expected
causative agent. So far so good.
The scientists actually hadn't had the
human behind the curtain cause the stick to move, that was actually
done by someone else the crow never saw. So next the scientists had
the human not go behind the curtain, and then the stick moved. Thus
the causative agent became hidden. This meant that the crow had to
try to figure out what caused the stick to move.
So the crows were observed to see how
they responded. If they believed there was a hidden agent, then they
would remain wary about the stick moving even when there was no human
behind the curtain. And this is what they observed.
Actually what they observed was that
if the crow saw that the human had left from behind the curtain, they
wouldn't inspect the stick too much. If they didn't see a human
depart from behind the curtain then they would do much more
inspection of the stick before they'd return to doing what they'd
been doing before. In other words when they couldn't see a human
leave from behind the curtain, they'd try to look behind the curtain.
Is this another sign of intelligence
of crows? Perhaps. That seems to be one of the results that these
scientists take from the experiment. If it is a sign, it's one that
most of us should work to apply in our own lives. When you don't know
the cause, well, try to look behind the curtain. After all, Toto did.
(To read more about this check out this blog post. )
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