On 4/29/07, David Gerard dgerard@gmail.com wrote:
They are "trusted" not to be spam links. If they are "useful", it is quite unlikely they will be spam links. Not impossible (as I'm sure Geni is about to point out), but unlikely.
We don't discriminate between external links in the same way. We have nofollow across the board, whether they are "useful" or not.
Of course, there are good arguments for turning off nofollow for external links; I don't really care what we do, as long as there is consistency.