The beauty of HT scoring is that, in this sort of situation, the dog need not be given a zero on the entire test, which is what the above quote advocates.This dog was not only handled but handled to the area because it was in the act of returning to an old fall. The handle in this case was a salvage move by the handler to prevent that zero. The dog didn't have a clue.
In my scoring method, the third bird is worth 10 pts.....the other outside bird is worth 10 pts because it requires some memory...the "go" bird is worth 5 pts (stay with me...) for a total of 25 pts available on this test.
So when the dog goes for the memory bird, he's got 15 pts (or 100% of the available points so far) in the bag....now, granted, I'd give him a -0- too for that last bird, but when he delivers to hand, he's got 15 out of a possible 25 pts for that series (60%, or .6) and the bird he blew was the toughest bird of the three. I'm not very likely to throw him out for one blown memory bird.
If a Master dog shows me he can't remember a memory bird in two consecutive series, he won't be back for the third series unless there are valid mitigating circumstances....especially if one of the series is a double.
"Hard line" thinking is part of the problem with judges in HTs today where we're trying to "test" dogs, not eliminate them. Set up fair and challenging tests where the dogs that do the work are rewarded and the ones that don't, aren't.