How much dup content is too much?

[TomSnow]

I'd like to feature geo-specific client reviews on my city pages.

They are about three sentences, max.

If I feature the same review on three different pages, do you think Google would consider this duplicate content and derank my page?

The rest of my content will be unique and as valuable as I can make it.

[tangor]

If treated as as CITE or a QUOTE I doubt you will have any problems. In the real world that is how it works "x said this and was posted to y and z" ...

But that requires us to believe g is "real world" these days. (sigh!)

Secondary: Three sentences is NOT duplicate content.