[malloyd]

I think the central problem with Cannot Learn is that it's described in terms of limiting future point spending in Basic. That's a just a set of Taboo Traits, worth 0 points. In order to qualify as a -30 point disadvantage it has to restrict you in play somehow, but the description doesn't provide any clues to how it would, being confined entirely to the zero point character advancement stuff. That gap leads to radically different interpretations that cause it to range from "free points" to "unplayble character" depending on what the GM guesses the effects are "supposed" to be.