bluejak, on 2011-May-17, 18:42, said:
"Simply and obviously"? Well, I would say the reverse: it is simply and obviously true. Your idea seems to be that a trick containing some number of cards other than four is not defective is strange, to put it mildly.
But that is not "my idea" at all, nor can I place any construction on anything I have written that would compel the conclusion that it was "my idea".
In the first place, I have argued that because of the mechanics of duplicate bridge, it is meaningless or almost meaningless to speak of a trick's "containing" any cards whatsoever. It is pran, not I, who argues that because at rubber bridge one player picks up the four cards played to a trick and puts them in front of him, thus creating a physical aggregation that can be referred to as "a trick", this physical aggregation should be assumed to exist at duplicate bridge. This assertion is so ridiculous as to be put into a category referred to by scientists as "not even wrong", but he believes it, and I assume from what you have written that you believe it also.
In the second place, I have consistently asserted that when four cards, one from each of four hands, are played to a trick (whether by being physically faced on the table or by being called by declarer from dummy), that trick is complete
and inviolate. What happens thereafter to the physical objects contributed to the trick is a matter of supreme irrelevance, always provided that the players at the table confirm that the trick actually was played in the manner described. This means that:
bluejak, on 2011-May-17, 18:42, said:
Completely wrong. Your logic is clearly false. If you have a jar that you say contains an even number of carrots, and you remove a carrot, to say it still contains an even number of carrots because it once did is neither correct nor logical. Also it does not mean that a carrot has become not a carrot: it means it is no longer there.
A defective trick is one that does not contain four cards, one from each player. History has nothing to do with it. Your suggestion that it can only happen if a card is unplayed is "simply and obviously" wrong. It may happen in other ways, of course, but a card cannot become unplayed.
is more or less unmitigated bilge, though it contains (as I have already remarked) an element of truth.
The trouble is that you (and pran) are wedded to the idea of a physical "trick" that "contains" a "number of (physical) cards". There is no such thing at duplicate bridge, as I have been at pains to explain. But we will pursue your analogy further, because it is not entirely hopeless.
Once four carrots have been placed in a jar, we label that jar "complete". Once a jar is labelled "complete", we forget about it - we do not change the label on the jar, even if a malevolent wombat steals therefrom a carrot for some purpose that may range from global destruction to sexual gratification. For our purposes, that jar is "complete" and, because it has been consigned by us to the dustbin of history, nothing that happens thereafter can render it "incomplete".
In so doing, we do not say that the jar still, or "now", contains an even number of carrots. We do not care how many carrots the jar is later found to contain. Nor should we; suppose we were paid by the hour to produce "complete" jars, and we claimed to have produced 100 but our employers paid us for 99. No tribunal in the land would uphold our employers' decision to pay us for only 99 jars if it turned out that the 100th jar had a carrot stolen from it by a wombat.
In the third place:
bluejak, on 2011-May-17, 18:42, said:
A defective trick is one that does not contain four cards, one from each player.
is true insofar as the word "contain" is meaningful, which by and large it is not. Rather, a defective trick is one to which some player has contributed some number of cards not equal to one. That is:
bluejak, on 2011-May-17, 18:42, said:
History has nothing to do with it.
is bunk. History has everything to do with it: if the historical record shows that each player contributed exactly one card to a trick, that trick was not defective and cannot later be shown
in any manner whatsoever to have been, or now to be, defective
bluejak, on 2011-May-17, 18:42, said:
Your suggestion that it can only happen if a card is unplayed is "simply and obviously" wrong. It may happen in other ways, of course, but a card cannot become unplayed.
Of course a card cannot become unplayed. But would you (or pran) mind explaining to me how a trick to which four players each contributed one card can later be regarded as defective (that is, by now containing three cards), other than by assuming that in fact one player did not contribute a card to the trick?