Firstly, the Conservatives promised a referendum on Europe and that's never going to happen so parties don't always deliver on their manifesto promises. Secondly, the SNP promised a referendum, they didn't promise independence. There's a big difference and one day when you are older, you will understand. The SNP aren't a single-issue party like UKIP. They came to power because of their policies on healthcare, education and public spending. For 70% of the population in Scotland at the moment, independence is irrelevant.
What side of the line do the SNP fall on?