The stance of the Scottish National Party is cynical and disingenuous. In attempting to dictate the timing of the referendum to late 2014, and to include a question on transferring of further powers, they are trying to allow themselves as much time as possible.
In addition, they will, of course, have the fallback of securing a Yes vote on the devo-max question and, in so doing, taking an incremental step toward eventual separation. Scottish voters are much more likely to vote Yes on devo-max than on Yes-No.
The Government should call the SNP's bluff and co-operate on the referendum, putting the Yes-No question to the Scottish people and, at the same time, the devomax question to the British people. I believe the outcome would then be a No on both counts.