why spend the time mounting one hell of a costly, in terms of time at least, campaign to silent questioners ?
Costly? In terms of time? Not really, refuting your clumsy, ignorant and pointless posts is a rather trivial exercise for competent people.
As spork mentioned, we know you are not a skeptical questioner but simply a denier. The reason is that you have never demonstrated the skills or background to determine if the cart can work or not. In fact it is blazingly obvious that you don't have any valid reason either to believe it works or to believe it doesn't work. Why you chose to believe it doesn't work is proper fodder for psychologists, psychiatrists and sociologists; I am none of those but in the end my amateur opinion is that it's easier to simply claim "fake", perhaps to get attention like a spoiled child, even if you can't back the claim up and end up suffering ridicule as a result.
Bill, you don't have to be silent, but the nonsensical detritus you pointlessly posted up to this point have been consistently wrong and have consistently contributed nothing (zip, nil, naught, nought, zilch, zot, nada, bupkis, zero, diddly squat) to the discussion. Your pointless posts can only serve to confuse smarter people who have a chance of actually understanding the cart. Fortunately the pattern of your pointless posts fits that of a troll so anybody reading more than a few of them will quickly realize their lack of value and ignore them. Even so it should be an overwhelmingly obvious conclusion to everyone, except perhaps to you, backed up by over a month of evidence, that you could exercise simple politeness to everyone else by not posting anything at all.
Bill, your pointless posts are of no more use to this thread than if you believed the cart did work, because even then your pointless posts would still only confuse people as you have not the skills to constructively contribute to this thread either way. Your pointless posts are a destructive and unwanted force here.