The assumption is among other things that it is correlated with past voting for the SNP, eg see (a few months old) http://blog.whatscotlandthinks.org/2014/07/wh

The assumption is among other things that it is correlated with past voting for the SNP, eg see (a few months old) http://blog.whatscotlandthinks.org/2014/07/who-is-right-yougov-or-survation/ http://blog.whatscotlandthinks.org/2014/07/who-is-right-youg...