After North passes I bid 1♣ and South doubles. North responds 1♥ and I bid 2♣. South bids 2♥ which is passed round to me; I opt to put in 3♣ and this ends the auction.
Dummy has ♠109xx ♥xxx ♦QJx ♣Qxx or similar. The defence gets off to a good start and I even misguess clubs completely resulting in 2 club tricks for the defence, but they fail to get diamonds going and instead play spades which allows me to make the contract.
What's the problem then? Well, partner had hesitated for around 7 seconds longer than his usual tempo after the 2♥ bid. As a result the director was called and the 3♣ bid was disallowed, with the score rewound to 2♥+1 for NS.
This got me rather mad at the time (until I found out we won the match 20-0 anyway) - and this is simply because of the very poor way (IMO) in which the UI laws are designed in these situations. I have no fewer than six points which I wish to put forward here, and of course would like to hear other people's views on this topic - with a view to considering whether the laws should be revamped. Note that some of this will almost definitely apply to other kinds of UI (asking about alerts, etc) as well.
1) A hesitation doesn't necessarily imply anything at all.
Sure, most of the time (when partner wasn't just half-asleep) it would imply partner had "something to think about" - in particular, whether to bid or not bid. But that's purely assumption - he might be thinking about what to have for dinner when he gets home, or the previous board, or what to lead, or how high the opps can get before he starts doubling, or... You get the point anyway - to what extent is it justified to assume partner is specifically thinking about some particular topic without asking him?
2) An LA for one person isn't necessarily an LA for another.
This results in a slight lottery when the ruling is made - if you get a set of directors whose bidding style is different from yours, you're almost guaranteed a ruling against you. Polling several players is a good way to compensate for this but the poll sizes are far too small to be statistically significant (this is, of course, a matter of practicality; not much can be done, but see below).
3) Lots of factors, all AI, are overlooked.
In the above case the director told me he took into account "the strength - on my left - and the vulnerability, which is against me". Fair enough - the bid is a little optimistic, but then again I'm an optimistic kind of guy. A conservative player would definitely pass - but the kind of player I am hasn't been taken into account here. This is particularly important in the situations where part of the ruling is "it runs the risk of partner raising to 6 (or whatever) which will be a disaster" - partner has knowledge of my bidding style, so the level of risk may be very different from what the Directors judge it to be.
Table feel is also overlooked - you may have picked up on something, for example if North had hovered near the Stop or 2♥ bidding card before bidding 1♥, you might infer he had extra values. Or the opponents might be like me who think out loud (very quietly though ofc!) and you may have overheard "2's making but 3 isn't". Or you might have accidentally been shown the ♣A in South, or whatever.
Most importantly IMO there isn't any consideration as to why I bid 3♣. Here despite having agreed partner's hesitation I judged it was worth a shot as it only needed 2 queens (the spade and club Q) opposite to make - this wasn't even too unlikely on the bidding as the opps hadn't tried for game or anything. Then there's the possibility partner would have the ♦K. South having not made any particularly encouraging noises implied North had some values (so I may end up guessing spades correctly). Finally I figured neither would have a good reason to double, and there's no chance I'm beating 2♥ so there's no harm in going -100 in the (likely) worst case.
4) Opponents get a "shield" against bad results.
Take the above case - opps didn't bid 3♥, didn't double 3♣ (it should be down), didn't defend 3♣ correctly and didn't have to make 9 tricks in hearts themselves, but come out with +140 (par on the board). I guess the Directors should take into account if there's a tricky squeeze or whatever for the 9th trick (and possibly award a split score) but even here, if the would-be declarer is of low calibre he's getting a small added bonus for a squeeze he'd almost never find.
On the flip side of the coin, if 3♣ had been doubled and gone for 800, the opps would happily keep silent...
So almost every time someone bids after their partner hesitates, the opps can simply call the director - and after that they need not really try to play good bridge! They can rest assured that, 90% of the time, they'll get a good score on the board anyway.
5) Bridge is a mind sport - thinking is a part of the game.
I'm not sure if there's a better method - I'd be grateful for any suggestions - but when I have to weigh up whether to make a bid or not, I use two things: my past experiences, and a quick simulation (construct a few hands consistent with partner's bidding, put them opposite mine, look at how many tricks are made taking into account opponents' bidding). Now I've only been playing the game 5 years and not very frequently at that, so my "past experiences" database isn't particularly large - hence I use the simulations a lot. But to do these simulations can take anywhere between 5 and 60 seconds (I lose track of possible points when partner opens 2♣ ).
Even if all players at the table are experts (perhaps even more so!), you can't expect people to be able to judge instantly whether to bid. Hesitations should be expected (and even "encouraged" in the sense that people should think about the best course of action rather than playing lazily). To put nasty restrictions on partner after a hesitation thus seems counterintuitive.
As a result of the above, a pair of novice players who didn't know about this law will be rather annoyed when they find themselves thinking a lot (since they're new), then told they're not allowed to think without penalty. In particular:
6) Gambling is a part of bridge too - and you should always be allowed to play bridge.
After reading the above you may be thinking I've forgotten to take into account that if my bid is clear-cut, I've nothing to worry about. The thing is, in competitive auctions especially this is rare. Bridge is a game of luck as well as skill; for example, you bid 38% VUL games at teams because that way it's going to pay off in the long run. Any one particular case is just a gamble (eg which player has a particular king). In the above example the expert (Jeff someone, to whom I offer my thanks once again for his advice) described my 3♣ bid as "a gamble that's likely to win". So why, just because partner has hesitated, can I no longer gamble? It's an integral part of the game and should always reasonably be allowed no matter what's happened before.
Go back to those new players I mentioned above - they may well gamble a lot more since they're inexperienced, and often be penalised rather harshly when their gamble works out well.
What I'm proposing is that the law be changed to not look at logical alternatives but whether the action chosen is a logical possibility based on the AI factors available to the player at the time. I bear in mind the interesting 6♦ bid mentioned in another forum - of course one must guard against people cheating blatantly (I'll admit to passing a little judgement on that bid here btw) by taking advantage of UI. But surely the law should be written in an "innocent until proven guilty" kind of way, and take into account the factors above. So (broadly speaking) if the bidder can justify his bid after the hesitation, it should be allowed; and if it's a gamble that pays off, the result should stand. Unfortunately these judgement rulings are always a bit wishy-washy, so 10 bonus points to the person that comes up with a good test!
Sorry for the long post; I hope you find this topic of interest.
ahydra