Canonical for two landing pages with the same content

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  Michael Martinez: First, there is NO "duplicate content penalty". Second, if you`re only talking about TWO pages, the search engines won`t care. Duplicate content only becomes any kind of a problem when you have a lot of it. Third, if these are PPC landing pages you should be preventing crawlers from indexing them anyway so that your non-paid search referral traffic doesn`t distort your tracking data. So the short answer is: "Noindex" the pages to preserve the integrity of your performance data.
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  Cassy Richardson: Thank you! 🤗
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  Cassy Richardson: Noindex, follow?
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  Michael Martinez: Cassy Richardson I normaly just "noindex" PPC landing pages and leave it at that. Nothing should be linking to them anyway. But people might sometimes link to a landing page if they think it is worth discussing in a forum, so I guess "noindex, follow" would be okay.
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  Cassy Richardson: Michael Martinez here is a q&a that expresses basically the same situation I`m in. https://moz.com/.../landing-pages-for-paid-traffic-and...
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  Cassy Richardson: But I think it`s unnecessary to use both canonical and noindex...
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  Michael Martinez: Canonical declarations really only matter for indexable pages.
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  Paul Thompson: Yea, canonical and no-index are contradictions. The canonical would be ignored.