in a recent project I've decided to create a page template (PageX) which is a kind of "stack" of subpages. This template simply includes the content of three other separate pages (PageA, PageB, PageC).
I'm just trying now to find the best way to avoid duplicate content for SEO, as Wordpress automatically create specific permalinks for these 3 subpages.
Is there a way to tell Wordpress that these pages must not have permalinks?