jhenrikj, on 2011-May-20, 06:36, said:
So what you are saying is: The information from the IB is not UI (because if you say it's UI you are using 16D) But it's not AI since there is no law saying it's AI. So in this case we have information that is somewhere between AI and UI. Please explain to me how this third state of information works.
I'm not sure I really want to go into the terminological problems of Law 16 et al, but you're starting from the misapprehensions that AI and UI are (1) mutually exclusive, (2) complementary (in the sense that between them they cover the whole information space), and also (3) that the Law concerning the information you may use in making a call or play is determined solely by whether the information has either of these labels.
None of these is true, it seems. That is why I was careful in my previous post merely to say that there is certain information, defined in Law 16A1&2, that you may use in making a call (I inaccurately said "bid") or play - let's call it "usable" information - and the rest, which Law 16A3 defines as "extraneous", and which you may not use. Now we have two terms that are both mutually exclusive and complementary, and if you focus on those you'll see what the Law actually says.
If you really want me to elaborate on this:
- Various Laws provide that certain information is "authorised" (for a particular side or sides). Pieces of information covered by such Laws are labelled "AI". Generally, you may use such AI but occasionally you are subject to restrictions when doing so (see a later comment).
- Various Laws provide that certain information is "unauthorised" (for a particular side or sides). Pieces of information covered by such Laws are labelled "UI".
- The combination of these particular words unfortunately suggest that they cover the whole information space and in a mutually exclusive way: in fact they don't - they are just labels. The use to which they are put illustrates this: AI in practice means something like "information you are entitled to know" (NB not the same as "make unrestricted use of") and UI is "information whose demonstrable implications you must studiously avoid": put like this, and you can see why the items given these labels need be neither mutually exclusive nor complementary.
- Further, as I recall it has frequently been accepted in these forums (I'm not going looking for examples) that some information can be available to a player both as "authorised" information and as "unauthorised" information, and that in these circumstances the UI restrictions continue to apply. Such instances are examples of information that is both AI and UI.
- Similarly, there can be information that is not defined by any Law as either AI or UI. I am quite prepared to accept that, absent Law 16D, there may be no Law that specifies that the information from the IB is UI for either side (arguably, if it's not authorised then it comes within Law 16B for the offender's partner), but that does not matter. For the reasons above, that does not make it AI to anybody. In the absence of a Law that specifies that it is AI - and again in the absence of Law 16D there is no such Law - it would then have neither label attached to it.
- The key point is that if it is not specifically Authorised somewhere then (given it's not a legal call etc as before) it will not be in the list of "usable" things specified in Law16A1&2 as information that may be used in making a call or play, and under Law 16A3 it is therefore "extraneous" and may not be used. The fact that it may not be specifically labelled UI somewhere is irrelevant.