> The Tilbrook, Pike, Redelmeier QED for Unix was based on the ed source code. I thought spiritually, QED begat ed, but are you saying for this specific implem

> The Tilbrook, Pike, Redelmeier QED for Unix was based on the ed source code. I thought spiritually, QED begat ed, but are you saying for this specific implementation the lineage went QED ~> ed -> T/P/R QED ?