freejung - 10:44 pm on Aug 13, 2010 (gmt 0)
Furthermore, wheel, there is one case where it is very well-established that some links affect the viability of others. Consider the effect of run-of-site links vs. the effect of a single link. I think pretty much everyone agrees that 100 links from the same site are not as valuable (all else being equal) as 100 links from 100 different sites. So when you get that 100th link from the same site, the "viability" of that one link is affected by the fact that you already have 99 other links from the same site; it doesn't make as much difference as it would if you had no other links from that site.