Re: Fraud Number 3: U-Gene
From: Bob Badour <bbadour_at_pei.sympatico.ca>
Date: Tue, 20 Jun 2006 21:01:23 GMT
Message-ID: <DmZlg.109$pu3.1821_at_ursa-nb00s0.nbnet.nb.ca>
>
> But a variable is time varying; an attribute is, for want of a better
> word, an attribute of a relation *value*, so it can't change. I simply
> don't see how this confusion can come about.
>
> I don't see that. Values never change. Which value is indicated by a
> variable can.
>
>
>
> I'm not confusing them; I'm saying that I don't see a need for the
> separation between them that you're describing. Can you say why you
> would separate them in such a way ?
Date: Tue, 20 Jun 2006 21:01:23 GMT
Message-ID: <DmZlg.109$pu3.1821_at_ursa-nb00s0.nbnet.nb.ca>
Tony D wrote:
> Cimode wrote:
>
>>>But I'm not sure how you could confuse an attribute with a relvar. >> >>As I stated B4 if their definition are too similar to be clearly >>distinguished..It's an open highway for unexperienced audiences to >>confuse both. This is the last explanation I will give on that >>point...I have already answered above and I will stop reexplaining....
>
> But a variable is time varying; an attribute is, for want of a better
> word, an attribute of a relation *value*, so it can't change. I simply
> don't see how this confusion can come about.
But an attribute is a variable in the sense that predicate calculus uses 'variable' even if one cannot use imperative statements to change it.
>>*change* is a verb that leads to confusion in defining the relationship >>between variables and values. *change* supposes a modification of >>state which. I prefer the definition of variable as a *value holder* >>which give a much more clearer indication .
>
> I don't see that. Values never change. Which value is indicated by a
> variable can.
>
>
>>You are confusing domain and type...
>
> I'm not confusing them; I'm saying that I don't see a need for the
> separation between them that you're describing. Can you say why you
> would separate them in such a way ?
I have no opinion on the remainder. Received on Tue Jun 20 2006 - 23:01:23 CEST