Let's suppose that independence-proponents lose narrowly in the upcoming September referendum -how much of an effect will the results have on the 2015 Scottish parliamentary elections? Is the SNP safe regardless?
It's hard to say, but my feeling is that a narrow loss would not be seen as a bad result for them, so there wouldn't be much effect. A thrashing (75-25 or something like that) might be a different matter, but doesn't seem very likely.
A narrow loss would be fine, but they would run into the problem that the PQ has where they can't ever have a referendum unless they're confident they'll win as a decrease in the Yes% would be seen as a massive failure.