God people in here going full on 'one swallow makes a summer' argument. Or a world champion who understands game theory far better than most said it was wrong so it must be right. The last few pages must be an appreciative nod to PakPassion. Declarations are totally something you can look at with a maths brain and make better calls than professional cricketers. Because the main variables are bad light & umpire interpretation (which as said yesterday they were very lenient with), rain (you can get hourly percentage chances on it occurring - which varied between 10 and 33 percent when I last checked, the higher ones were more for tomorrow), the sort of typical range of scores that are in Pakistan's ability, as well as how many overs they can bat. I don't expect Cook to interpret all these factors, but England have plenty of backroom staff who would make a better call than Cook with Broad and Anderson whining in his ear about having to bowl more than 12 overs in a day.
It's not about exceptional examples, saying it is wrong to enforce the follow-on because a team batted out 199 overs once. It is about what gives you the best chance. Cricket is all about playing the percentages. There's never a 100% foolproof option. Whether it is the game as a whole or a particularly delivery. You can't play in fear of making a mistake or having a bad result. It's like when Sri Lanka got bowled out when they only needed to bat out 40 or so overs for a draw. It was unlikely, but you give yourself the best chance of winning and you will win more games ultimately.
Australia have gone full-moron ever since they lost when enforcing the follow-on. They've completely ignored the fact they could have replayed that Test 1000 times and never have lost again. That it took all time great innings, a full day's play without a wicket falling, a comically inept Australian batting performance. The focus should be on that, not the decision because the decision was correct.
Here there should still be attention paid to the decision, no matter what happens, because it was a shocking decision and they need to learn from it.