1 – Any Page that you make and publish creates Google Page Rank that is greater than 0. This violates the 1st Law of Thermodynamics “Matter (Page Rank) is neither created nor destroyed”. Google doesn’t care. Every time you publish a web page and it gets crawled, it gets assigned Page Rank just for existing.
That means that the more legitimate, non-duplicate pages you have on your site, the more you can affect your OWN rankings with internal links!

2 – Duplicate Content “Off-site” is practically irrelevant.
“On-site” Duplicate Content will kill your rankings.

3 – Your Web Page Template (Navigation Links, Footer Content, Side Bar Content) counts in the Duplicate Content calculation.That means if your Web Page Template’s content has 200 words, and the rest of the content on your page is 50 words, you might have Duplicate content issues.

4 – The Google Cache Date of any web page can indicate the relative power of the links on that page.
The more current (Fresher) Google’s Cache date of a web page is, the more likely that the links on that page are getting counted. If the page cache is constantly getting updated, that’s a pretty strong sign that the links are getting counted MORE than a page where the cache date is old.

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