nige1, on Sep 19 2010, 07:54 AM, said:
It does not matter what is the real reason for the unauthorised information.
No, but it matters whether there is actually any "information" at all.
In the present case, it is being argued that a man with information regarding board x cannot be held in breach of Law if he applies the information regarding board x to board not-x, however successfully he does so.
In the general case, it may be argued that a player who would not take action x if he knew his partner's hand cannot be held to have taken action x because of information about his partner's hand, thus has not breached any Law.
The trouble is that "information" is an ambiguous term. Originally, "information" was that which "informed" (that is: shaped - "formed" - or influenced) the way in which people behaved; it did not matter whether the "information" actually corresponded with reality. Thus, a man who bids 3NT on a minimum after 1NT-slow 2NT is "informed" by his partner's tempo, whether or not his partner's tempo is itself "informed" by anything in his partner's hand. In that sense, one may rule against the player under Law 16 if 3NT happens to make - as indeed one frequently does so rule.
But that definition is nowadays close to obsolete. In the normal run of events, one distinguishes among "data" on the one hand and "information" on the other by regarding the former as potentially false or meaningless, and the latter as true (or at any rate, corresponding with some putative reality held for convenience to be true).
Specifically in bridge, one speaks of "misinformation" as distinct from "information" in saying that if a player is told something that is not true about an opposing partnership's agreements, that player is entitled to redress if he has done something deleterious as a result; while if he is told the truth about the agreements (though not necessarily about the cards the opponents hold), he is not.
Thus, in times gone by "information" was merely that upon which someone acted - it did not matter at all whether the basis of the action was factual. Nowadays, one regards "information" as to some extent a measurable quantity conforming to a factual state of affairs - the field of information theory, and the terms "misinformation" and "disinformation" attest to this. The Laws of bridge use the term indiscriminately in both senses, to the detriment of clarity but (perhaps, though not always) to the benefit of justice.
The confusion between the archaic and the contemporary senses of the term "information" actually works fairly well for the practical purposes of administering the game of bridge (though I should stress that this is a fluke; different formulations of the Laws would work better in terms of making it clear to players what they should and should not do). It works better still when combined with such splendid but semantically useless phrases as "could demonstrably suggest", because anyone with half a brain can demonstrate that almost anything could or could not suggest almost anything else; so that the bridge world can for some decades yet pursue the Kaplan Model: "if someone has done something undesirable, there almost certainly exists an interpretation of Law under which he should not have done it".
In the present case, the guy who underled his solid clubs on board x even though he knew only that it was the right defence on some board either x or not-x, and it happened to be the right defence on both boards x and not-x, was "informed" in the archaic sense to underlead his solid clubs on some board or other, and should be ruled against just as if he had been "informed" in the contemporary sense that board x was the board on which it was right.
In the general case, the man who bid 3NT on a minimum should similarly be ruled against, for if you hesitate, you get shot. You may not think that this is a particularly equitable state of affairs, but I cannot help that. It is the Law.