A thought just occurred to me. What if Demandred is using Taim, trapping him in a weave like the one that Sammael used to try and reach a truce with Rand? Maybe this is why the Black Ajah/Shadow wanted to rescue Taim from the clutches of Aes Sedai. Maybe they used a weave that made Taim and Demandred so alike that they had the same mannerisms and the same dominating prescence. Demandred, a general second only to Lews Therin in the War of Power would not have been captured by the Aes Sedai of this time because they are not skilled enough and the Dark One would not be as pleased with Demandred as he seems to be. He himself is too skilled. Maybe the Forsaken realize that there is more to Rand than meets the eye, as he has shown tendencies to act like Lews Therin and to say things that only those from the Age of Legends would know. Any of the Forsaken spies close to him would speak of this to their superiors and Moridin/Ishamael is one clever enough to notice this. When Asmodean was killed he recognized his murderer. Maybe it was the first time Demandred decided to use his proxy Taim. Maybe a test to see if he would pass the look-alike test. Taim may just be Taim, but trapped in a weave that leaves Demandred in control of his bodies and actions. Letting Taim work out in the open while he is safe out of the view of everyone else. After all, who is to say what skills the Forsaken have with their knowledge of the One Power? This may be another one of the nasty weaves that Asmodean was talking about. It could be. It is possible. Just a thought.