Was Lance clean? Don't know.
Were Indurain or Hinault clean? Don't know, either. How about Merckx? Depends on your definition of "clean".
Pantani? Dirty. Hamilton? Dirty. Ullrich? Dirty. Landis? Probably dirty, too.
I guess my point is, are we now assuming guilt by association? Without a positive drug test, or a credible witness that can say "yes, he's dirty", doesn't anyone think it may be a bit of a stretch to call everyone guilty?
I've heard some dopers use the excuse that they had to do it "to survive". Although I don't like the choice of words, I can understand the meaning. The raises the question...were these guys trying to survive in a climate where all the top riders were dopers, or were they simply not good enough, and felt they had to cheat to compete?