With a wordpress setup as follows of pages, custom posts, a custom taxonomy of colours and rewrite rules in place:
Pages: Archive: -fruits Single: --fruit/apple --fruit/orange Archive by colour: ---fruits/colour/%colour% -vegetables --vegetable/potatoe --vegetable/carrot ---vegetables/colour/%colour% -colours --colour/red --colour/green etc ...
I could quite feasibly structure archives to be found at the following
In the context of how a user could navigate a site I can see the benefits of having both paths available but pointing to what is essentially the same content.
Should this be avoided with respect to SEO and avoiding duplicate content?