I have a question about a particular speculation that's been flying around for some time now (it's about Jon Snow):
Where the hell did people get the idea that Jon is a Targaryen? How does it even remotly make any sense? Even a half-targaryen seems unlikely as hell... So what's the general consensus regarding this speculation, and again where the hell did it come from? To me it seems just insanely ridiculous, but I've only read all the books...
That theory has been around since the first book. Rhaegar Targaryen had Lyanna Stark for about a year, and the theory is that during that year she got pregnant with Jon and died giving birth to him in the Tower of Joy when Ned found her. In Ned's flashbacks to the ToJ, he finds his sister in a "bed of blood" and she keeps saying "promise me, Ned." The theory is that she had him promise to keep her baby safe. Since Robert wouldn't be too happy about Rhaegar and Lyanna having a son, Ned lied and said he was the father to protect him. The timeline for all of this matches up with Jon's age and there have been other hints dropped throughout the series.