Kevin Rudd was coy last night about which of his cabinet colleagues had supported the strategy of ''killing'' the emissions trading scheme altogether in March and April last year.
But the Sydney Morning Herald has already reported who did.
Initially we heard that it was national secretary Karl Bitar and NSW right frontbencher Mark Arbib.
But in a deeper post-election post-mortem of the period during which the Rudd government hit the wall we discovered that two other frontbenchers had also eventually come around to advocate what was being called the ''kill option'' - Julia Gillard and Wayne Swan.
Those vehemently, adamantly opposed were Penny Wong, Greg Combet and Lindsay Tanner. Rudd was caught in the middle, having invested more in the policy than almost any other, but aware that Tony Abbott was making strong headway with his ''great big new tax'' campaign.
Those arguing the government had to press ahead with its plan said it was both bad policy and disastrous politics to do anything else, given all the government had said before.
The issue was discussed by the inner ''kitchen cabinet'' and various groupings of these ministers at least a dozen times. Three weeks before the 2009 budget it could be delayed no longer, because the ETS had to be included in the budget figuring or taken out.
The ''kitchen cabinet'' decided it would be taken out of the budget and delayed until at least 2013. Some money was to be ''parked'' in the budget's contingency reserve to develop an alternative strategy to take to the looming election. The ''kitchen cabinet'' was due to meet to discuss that strategy on April 27, but on that same day the Herald revealed the decision.
Cabinet had been scheduled to learn of the decision, and the new ''plan'', two days later, on April 29. As then environment minister Peter Garrett revealed at the time, most of them learned about it from the newspaper instead.
It was the decision that appeared to snap voters faith in the government and in Kevin Rudd.
The former prime minister publicly acknowledged last night it was a serious mistake.
Lenore Taylor is the Sydney Morning Herald's national affairs correspondent.