Questions about butterflies

[John Grehan]

>
> >  13. Why do butterflies have two sets of wings?
>
>FOR THE SAME REASON CARS HAVE TWO SETS OF WHEELS AND AIRPLANES HAVE TAILS 
>AND AILERONS.  THIS ALLOWS THEM TO STEER.  ALSO IT ALLOWS THEM TO NOT HAVE 
>SUCH
>BIG WINGS WHEN THEY WANT TO HIDE, SINCE THEY CAN'T FOLD THEIR WINGS.

Both question and answer are problematic as the context for "why" is not 
obvious. The ability to steer is not limited to insects with two wings, but 
that ability also does not explain "why" they have two wings unless the 
ability to steer is considered the reason or purpose that the wings exist 
in the first place.


> >  15. Why are butterflies part of nature?
>THEY POLLINATE FLOWERS TO HELP THE FLOWERS MAKE MORE FLOWERS.  THEY ALSO 
>HELP CONTROL THE PLANTS THEY EAT SO THE PLANTS DON'T TAKE OVER, BECAUSE 
>EVERYTHING
>IN NATURE HAS TO BE CONTROLLED TO STAY HEALTHY AND MAKE IT STRONG.

This is similarly problematic in that the question invokes a specific 
purpose for butterflies which is beyond empirical experience to provide. 
The fact that they pollinate flowers and eat plants does not address "why" 
butterflies are part of nature any more than it might explain any other 
organism.

It seems to me that there is a mixing of "why" questions that deal with why 
the universe is the way it is, and the consequences thereof. Thus, the 
question might  be rephrased to ask what are the functional or 
environmental interactions.

John Grehan