Google and Content Copy

How does google know who has copied content and who is the writer of the content.

Eg.
Site A copies the content of site B.

How can google know that site A ist copying content of site B and not site B copying from site A ??

Is it because of "trust", "pr", the first site that was indexed with the content .... ?

I hope you can understand my bad English...

 

any example please .. so i can justify

 

i think they assign it to the page where they index the copy first

 

But what if the site that is indexed first is the copy ???

So the writer of the content will be punished by google??

Examples: there are millions of examples with eg blogs

 

Well, punished is a big word: but they will end up nr. 2 (instead of 1) in the serps for a specific query that would turn up that page.

 

I guess they'll counter in a number of factors. No one knows most of Google's algorithms, so no one can give the precise answer.

I personally think Google don't decide it by just the PR or the 'trust' - there's much more to it than just the two of those, but yeah, those two might matter as well.

 

I really do think they take the one that's crawled first. Since higher pr-sites / trust-sites are likely crawled more often - they do have an advantage here.

 

I heard somewhere that Google will be soon coming up with ways to detect who posted the content first. I can't remember where. But search engines realize now that this is a problem and are finding ways to address the problem.

 

i think the criteria is indexed date by google . if your copy is indexed first by google , you will have advantage .

in my opinion it's a stupid criteria but google does this

 

I agree.....