[net.misc] A Chicken/Egg problem

dvk (08/05/82)

Okay, here is some more stuff to clutter the wires with:

        "Which came first, the chicken or the egg."?

Now, seriously. Can you come up with a *proof*  that  either  one  or  the
other came first. I have a proof that the egg came first, and I am curious
if anyone can refute it and prove the opposite. It goes as follows:

Postulate: Evolution occurs as outlined by Darwin.

Definition: A chicken egg is one that *produces* as chicken, not one  that
is produced *by* a chicken.

Proof: If one assumes that "creation" did not include higher  life  forms,
but  instead  centered at the protoplasmic level, then all life forms have
evolved into what they appear to be today. Thus, for "man" as we  know  it
to  exist,  there  must have been a proto-man and a proto-woman that sired
the first "man". (The process is nowhere near as abrupt as this, but  this
will  suffice  for  purpose  of  example).  If one believes this, then two
proto-chickens must have mated  and  produced  the  first  chicken.  Since
chickens (and naturally, proto-chickens) lay eggs, the proto-chickens must
have layed an egg that hatched the chicken.  By definition above, this  is
a chicken egg, and thus the egg came first.

Now, if you change my definition of "chicken egg", you easily come up with
the alternate proof. (Big deal!) And if you say simply "the Bible says God
created all the animals on the earth, so the chicken came first", you also
get  Bingo.   Apologies  to  those  whom  this may offend,  but a book, no
matter what it is called, is just a book. I want proof.

So, without changing the definition of chicken egg,  can  anyone  come  up
with  the opposite  proof? You  may use any postulates you like, including
scrapping mine. But, "The Bible says so" just won't wash.

mkg (08/06/82)

The chicken is the egg's way of preserving itself.

   Marsh Gosnell  BTL Piscataway  (201) 981-2758  npois!pyuxbb!mkg

nrh (08/06/82)

Irresistable.  Without changing your definition, define a chicken as that
which can interbreed (productively!) with chickens.  Ignoring
a lot of metaphysical stuff about whether the newly produced animal can
be called a chicken if there are no other chickens of its caliber, 
and assuming that it is a chicken because it could interbreed with
modern chickens, we have trouble.  The problem is that if the egg 
came first, then what does one call the eggs of the creatures that
the (first?) chicken breeds with?  Remember, if they can fertilize
this chicken, they are chickens-- er -- roosters that are of the chicken's
species.

If there were no such inter-fertile animals at the time of the emergence
of the chicken, then either they appeared (does that sound likely?) 
at about the same time, or there are today NO CHICKENS.  Thus there is
no "first egg", and for that matter, no first chicken.

					Yours for no chickens,
					Nat Howard

wolit (08/06/82)

Marsh Gosnell's remark ("A chicken is an egg's way of preserving
itself") may have been intended to be humorous, but it is an idea that
is not without merit.  You can get an interesting perspective on the
"purpose" of life by looking at some members of the insect world who
carry this philosophy to an extreme:  in many cases the adult form of
the organism is in no way dominant, in terms of size, lifespan, or
energy expenditure, but exists solely for the purpose of mating
(once!) to produce eggs.  Adult Mayflies, for example, live for only a
few hours (out of a year-long life cycle) and neither feed nor travel
very far from where they emerged.  The larval form is the one that does
most of the "living" as we know it (except for sexual activity).
The adults seem sort of like detachable gonads (see earlier
discussions in net.jokes.limericks.q).

mark (08/06/82)

Here are two "proofs" that the egg came first.

(1) I'll postulate that evolution occurs by mutation.  The mutants that
    are inferior tend to tie, those that are superior (rare but certainly
    present) tend to do well and become dominant.  Now, when does mutation
    take place?  Either from a defective egg/sperm, or early in the life
    of the embryo.  Once the reproductive organs in the embryo have
    developed, a random mutation is unlikely to affect any offspring.

    With this in mind, a proto-chicken pair mate to produce a mutated
    (chicken) embryo which becomes a mutated (chicken) egg.  This
    chicken egg becomes the first chicken.  (Presumably it must either
    have genetically dominant genes or inbreed with another mutant
    from the same litter to perpetutate the species.)

(2) The egg came first, because there were dinosaur eggs long before
    there were chickens!  (The rules said "the chicken or the egg",
    not "the chicken or the chicken egg".)

mkg (08/06/82)

My chicken preserving the egg comment was not intended to be humorous
(chuckles are OK... I smile when I think about the remark) but rather
to prod people to think about the chicken/egg problem from a different
viewpoint.
   Marsh Gosnell  BTL Piscataway  (201) 981-2758  npois!pyuxbb!mkg

nonh (08/14/82)

For an interesting discussion of "the chicken is the egg's way of
preserving itself", read "The Selfish Gene", by Richard Dawkins --
available in the Biology section of any textbook store and most
decent bookshops.
--Chris Robertson (decvax!utzoo!nonh)

mclure@sri-unix (08/15/82)

#R:mi-cec:-12500:sri-unix:1300001:000:497
sri-unix!mclure    Aug 15 00:47:00 1982

Dawkins' THE SELFISH GENE has been discredited and should be read as
science fiction (as he actually mentions in the foreward).  The idea
that genes can exist for specific traits, as Dawkins implies, is
anathema to most biologists.  Much of Dawkins' speculations rest on
this idea.

However, I felt the book was valuable in one respect: his emotionally
overwhelming description of the origin of life.  Excerpts of these
passages were reprinted in Hofstadter and Dennett's THE MIND'S EYE.

	Stuart

davidson (08/21/82)

I'm not sure how seriously to take people's chicken/egg arguments, but
here goes:  This business about chickens mutating from protochickens in
a single generation is nonsense.  Thus there was never any problem
about who to breed with.  "Proto-chickens" evolved gradually into
chickens, with the result that after a large number of generations, the
resulting individuals would no longer be able to breed with their
remote ancestors (assuming they were still around).

nonh (08/26/82)

What in the world do you mean, "Dawkins' THE SELFISH GENE has been discredited"
....?
It's prescribed reading for standard biology courses here at Univ. of Toronto,
and Dawkins is very highly regarded in his profession.  Unless  you are
an ethologist by profesion with friends in evolutionary biology, don't
make such wild statements. (Incidentally, I *AM* an ethologist by
profession with friends and associates in evolutionary biology...)
--Chris Robertson (decvax!utzoo!nonh)