Deborah Harrell wrote:
> 
> > David Hobby <[EMAIL PROTECTED]> wrote:
> 
> <snip>
> > Got me, what is the difference between disease
> > organisms and parasites?  
...
> Delineating one from another is not always
> straightforward.
> 
> My Steadman's definition of "parasite" is
> 1) an organism that lives on or in another and draws
> its nourishment therefrom
 
> Practically speaking, I think what makes something a
> parasite involves the "eeuuww!" factor: tapeworms are
> just *gross,* while cold-causing viruses really
> aren't.

So we're saying the word "parasite" is 90% connotation and 
10% denotation.  Let's test it.  Mistletoe is not gross, at
least unless one is a tree.  Do we call it a parasite?

> *Cats* are at least commensals, but frequently provide
> benefits to the lesser bipedal species as well; if
> they cause harm it is *deliberate and predatory,* not
> parasitical!

Benefits?  I could get the same effect by leaving stuffed 
animals lying around the house, and moving them now and then.
But I guess they "draw their nourishment" from cans, rather 
than directly from me.  So they are technically not parasites.
: )
And what's *deliberate and predatory* about lying around until
a furless biped trips over you?

                                        ---David
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