We've been discussing how humans recognize that they don't recognize objects/info. - "don't know" something.

How about how humans categorise in the first place ? How do we decide - to use another recent thread [see below] - whether *cybersex* classifies as *sex* or not, or whether *foreplay* and *Clintonian sex* classify as *sex*?

Or whether *anal sex gets you pregnant*? And does that last example belong to *categorisation* or merely *reasoning*? And whether "The relationship between cybersex and sex is of a completely different character to the relationship between penguins and birds" ?

How do we resolve/argue our disagreements about categorisation?

What I''m particularly interested in is whether anyone thinks these matters can be resolved by purely symbolic, logical reasoning and semantic networks [with symbolic/verbal definitions of what concepts like *sex* involve] or any other current computational methods.

My hypothesis is that categorisation depends heavily on the use of imagination - we have to imagine (albeit often unconsciously) the real things denoted by the concepts in order to "draw the line" as to what they do or do not include - visualise sex, for example, (and audiovisualise "reasoning") - to settle what we think does or does not classify as sex, and whether *anal sex gets you pregnant*. A very great deal of the time there are no suitable symbolic/verbal definitions available.

["Dear Alice, Last night, my girlfriend and I had anal sex without a condom. She is a virgin. Is there a probability for her to get pregnant?.."]

And, of course, if anyone wants to give us what they consider the latest cog sci/AI positions here, please do.



*******************************************

Benjamin Johnston <[EMAIL PROTECTED]> wrote:

The relationship between cybersex and sex is of a completely different
character to the relationship between penguins and birds.

Can you define that difference in an abstract, general way?  I mean,
what is the *qualitative* difference that makes:
   "cybersex is a kind of sex"
different from:
   "penguin is a kind of bird"?

You may say:  cybersex and phone sex lacks property X that is common
to all other forms of sex.  But then, anal sex or sex with a condom do
not get a female pregnant, right?  So by a similar reasoning you may
also exclude anal sex or sex with a condom as sex.

It seems that you (perhaps subjectively) require "having physical
contact" as a defining characteristic of sex.  But I can imagine
someone not using that criterion in the definition of sex.

Also relevant here is Wittgenstein's idea of "family resemblance":
sometimes you may not be able to list all the defining properties of a
concept.

YKY


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agi
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