Trying to write like I do, how cute. Nice to have imitators. On to your points, with the rhetoric removed.
As is clearly understood by the even the most rudimentary following of the technology industry, all of the top line products have offerings at a lesser price point with identical feature sets within the same product line. (B) is entirely negated.
Premises do not entail conclusion here. (B) is a necessary limiting factor to narrow the field of objects we are talking about. If everyone already knows that we should only be talking about the most recent products (e.g. those identified by B) then the correct conclusion is that my statement is a truism, not that it is negated. In "basic logic" you don't refute a conclusion by offering arguments for it

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B was offered precisely because it would be obvious to everyone.
(C) Was also clearly handled in the initial post by bringing in the comparison of cross fire 5850s which given the feature parity of a given GPU in either configuration then addressed users whose targets required a dual GPU solution. All three of the 'points' that you raise in the context of my post were rather clearly dealt with, only those lacking basic comprehension could possibly fail to see them clearly for precisely what they were.
I already addressed a point like this above and it's probably because you think I'm trying to make the same kind of claim you are. I'm not. Here's why pointing out an exception fails:
Your universal claim: All top end products are poor value
My claim: That only makes sense as a non-universal claim for certain components and certain people
You mistaking my claim for another universal claim: Oh yeah? Well here's an exception!
You can point out all the exceptions you like, it does nothing to my point. In order to prove me wrong, you need more than an exception, you need to establish the exception as the rule.
Again, your claim is that (1) "In all cases, the highest end product is a poor value" and my claim (2) "In some cases, the highest end product is a poor value for some people" which is logically equivalent to "In some cases, the highest end product is a good value for some people." Case (1) will topple under one exception, case (2) will not.
Conclusion: Your 5850 CF example doesn't do the work you think it does. In basic logic a counter-example only works against a universal claim, not an existential one.
The highest performing product available in terms of a GPU solution would be phase change modified tri SLI GTX 480s- which nVidia doesn't sell. Your argument fails on that aspect as well as what you are talking about is something none of the companies offer that I listed; which using your criteria my statement still holds as entirely accurate no matter what angle you wish to try and use.
It's annoying to see contradictions within such short arguments. It seems I mentioned a limiting clause that would eliminate products that aren't for sale... maybe "(B) In a current product line" entails identifying only products that are available on the market. Strange that you would argue, poorly, against it and then bring up a case where it's use is obvious.