does duplicate content hurt SEO & google ranking?

I'm confused by out of date information and I feel like it's a yes or
no answer- if I write an article and I post it on my blog and then
10-20 other people love what I say so much and cut and paste - does
that hurt my own rankings? Forget about copy right issues here - just
the SEO?

Does the answer change if they say "this information was originally
written by XXX" but never links to my site?

--
You received this message because you are subscribed to the Google Groups "Google Search Engine Optimization SEO Google - MSN - Yahoo" group.
To post to this group, send email to seo1@googlegroups.com.
To unsubscribe from this group, send email to seo1+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/seo1?hl=en.