Re: The Real Ideological Root of Terrorism DARWINISM AND MATERIALISM

John Wilkins wrote:

> shane wrote:
>
>>John Wilkins wrote:
>>
>>
>>
>>>shane wrote:
>>>
>>>
>>>
>>>>John Wilkins wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>shane wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>Robert J. Kolker wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>shane wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>Lets not discount the possibility he is both.
>>>>>>>
>>>>>>>
>>>>>>>Inclusive OR. Standard mathematical terminology.
>>>>>>>
>>>>>>>Bob Kolker
>>>>>>>
>>>>>>
>>>>>>
>>>>>>Apologies Bob, I am only a Boolean Algebra man and was taught to be
>>>>>>specific in such matters.
>>>>>>
>>>>>
>>>>>OR is inclusive in Boolean algebra too, I thought.
>>>>>
>>>>
>>>>
>>>>There is also an Exclusive OR and I was taught to always be particular
>>>>in specifying, in order to avoid confusion.
>>>>
>>>
>>>Do you mean XOR in computing? Boole himself specified that OR was inclusive.
>>>That is, he used the sign + to stand for "and" and "or" (Laws of Thought,
>>>p33). Boolean algebra is regarded as the logical system Boole specified,
>>>although the modern terms rely more on the symbolic logic of Frege and later.
>>>
>>
>>
>>All that is way over my head, I just learnt enough to decipher the logic
>>programs (and documentation) that were used to control the brewing
>>process where I work.
>>
>
> A noble task indeed, ensuring that beer is properly brewed (I take it you
> don't work for Carlton, Castlemain or Toohey's then?).
>
> Boolean logic is a two-valued (on-off, true-false) logic developed in 1854 by
> the Rev. George Boole in the cited book.
>
> It lends itself well to digital computers, and of course was so employed by
> the early programmers. The sorts of things you are used to seeing in computer
> prgramming languages, with OR and XOR and so on, were developed much much
> later (in the 1960s, if I recall correctly), and called "Boolean algebra", but
> in fact they are just Boolean *logic*.. The algebra is what Bob was referring
> to above. It is standardly written in the form of symbolic logic - OR is
> signed by what is called a "vel", and looks like a sans serif lower case "v".
> It is inclusive. In formal logic, to express an exclusive OR, you have to specify:
>
> (A OR B) AND NOT (A AND B)
>
> or the equivalent symbolism. In other words, XOR is a complex operator, while
> OR is a primitive one. So when you use OR in those contexts, it is always
> assumed to be inclusive...
>

Thanks John, that is possibly more than I ever wanted to know about the
whole shebang, but interesting nontheless.

And apropos of you brewing comment, I work for Carlton, where the aim is
consistency, so "properly brewed" doesn't necessarily come into it.

.

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