I think that saidar is not tainted-only saidin is tainted, because only males made the strike at Shayol Ghul. However, I agree with some things in the posting-during the Age of Legends, Aes Sedai probably married Aes Sedai, with a few exceptions. This is probably true because of the "Slowing", or less rapid ageing of the body caused by channeling. One man or women could bury five or six spouses. The ability to channel is a double recessive gene... therefore, the children of two channelers would automatically channel. (I'm not sure where individual strenth comes from,though. In the Age of Legends, the amount of channelers was probably atleast five times the present amount, both because male channelers could reproduce before they died, and because Aes Sedai had no White Tower looking down on marriage. I don't think that Saidar is tainted. The reason the number of channelers is deacreasing is because of the genetics,and the ethics of channelers marrying (everybody is afraid of Aes Sedai, and besides Rand's case, channelers don't marry). By the way, for the reference of the genetics of channeling, see pg. 30, paragraph 3 of Robert Jordan's Guide to the World of the Wheel of Time.