Blogs and Duplicate Content in Google

[NobleSavage]

I use a varation of that:

<?php if( is_home() | is_single() | is_page() ){

if ( $paged < 2) { 

echo '<meta name="robots" content="index,follow" />';
} else {
echo '<meta name="robots" content="noindex,follow" />';
}} else {
echo '<meta name="robots" content="noindex,follow" />';
}?>

If it helps - I don't know.