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[REBOL] Re: Sameness - an abstract approach.

From: g:santilli:tiscalinet:it at: 14-Feb-2003 1:17

Hi Ladislav, On Thursday, February 13, 2003, 10:29:59 PM, you wrote: LM> the function F one after another and the function F should get them as LM> different and find out which was which. That isn't the case as we both LM> agree, q.e.d. This is fine as long as the two "1"s are takes separately. I.e. it is like in my previous email when I gave you two indistinguishable pieces of paper not at the same time. They look the same piece of paper to you, because you have no mean to make a distinction (supposing you are not allowed to change them). But if I give them to you at the same time, even if you cannot discern a piece from the other you can say that you have two different pieces of paper (and the distinction is, for example, the hand that holds them --- one is on the left, the other in on the right). This can be applied to the "1"s above; if you have two of them at the same time, it is possible that they are like the two pieces of paper: interchangeable but not the same. (If I was going to implement a REBOL interpreter, I would do it so that any two "1"s would actually be different data structures in different memory locations --- even if they are equal in content and so totally interchangeable; this does not mean that REBOL has to be this way, but it means that this is a possible way.) Regards, Gabriele. -- Gabriele Santilli <[g--santilli--tiscalinet--it]> -- REBOL Programmer Amigan -- AGI L'Aquila -- REB: http://web.tiscali.it/rebol/index.r