The Scottish Affairs Committee of the House of Commons is about to start an inquiry into what it calls the unanswered questions about Scottish independence.
They include what would Scotland use for its currency and would a Scottish government have to apply to join the European Union?
And then there's the question of how an independent Scotland would defend itself?
The Scottish National Party claims Scotland would be able to afford to maintain its own armed forces - and it would demand that the UK government removes nuclear-armed Trident submarines from the Faslane naval base on the Clyde.
But has John Beesley has been finding out, even those sympathetic to the SNP believe the debate about Scotland's defence needs has barely begun.