Taxacom: Definitions

[John Grehan]

Hi Richard,

No, I Cannot provide an authoritative definition. It used to be simple,
with vicariance biogeography, but then some morphing took place to
vicariance cladistics. I don't keep up with who does exactly what in terms
of definitions. I think Morrone may have generated a definition, but I
don't have it to hand.

Cheers, John

On Sat, Aug 26, 2023 at 3:36 PM Richard Jensen <rjensen at saintmarys.edu>
wrote:

> Hi John,
>
> In your most recent post, you referred to "vicariance cladists".  Could
> you please provide a means for someone to determine if a person is a
> vicariance cladist or not?  This may require your definitions of both
> terms, as the latter, in particular, has gone through several iterations
> over the past 40 years or so.  Or, am I permitted to apply my own
> definitions to each term? If the latter, then how will I know if we are
> writing about the same thing?  It seems the definitions we use are
> necessary to prevent a repeat of the "fraud" missives that currently
> dominated this list.
>
> Cheers,
>
> Richard
>
> On Sat, Aug 26, 2023 at 12:46 AM John Grehan via Taxacom <
> taxacom at lists.ku.edu> wrote:
>
>> So as not to confuse with other issues, I teased this item out. My view
>> about definitions not mattering is in the context that definitions only
>> state what one has already decided or what one thinks one already knows.
>> Within those constraints definitions may matter, but they are just a
>> summary of a certain knowledge or decisions, not a key to the unknown
>> which
>> is what science is concerned with. For example, if I were to define
>> evolution as space + time + form, that may well be very informative to
>> some, and not so informative to others. So, dealing with the unknown, the
>> ascertainment of new knowledge, definitions really don't matter. But of
>> course thousands may think otherwise, and that's OK with me too.
>>
>> Cheers, John
>>
>> --
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>>
>
>
> --
> Richard Jensen, Professor Emeritus
> Department of Biology
> Saint Mary's College
> Notre Dame, IN 46556
>


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