Difficult one.
Either Armstrong gave up because it wasn't worth the fight but was innocent or he was indeed guilty. Eitherway the authorities generally suck.
Lance Armstrongs first 'title' can't go to the second place cyclist as he doped and his 2005 title has to go to the 8th placed cyclist because the other 6 doped.
All the title contenders of the era doped, though none doped their team as systematically as Armstrong. I find these to both be statements that can be made with a reasonable degree of certitude.