Probably the most persuasive rebuttal I've read in trying to follow memo story. It has an honesty about it. So the issues with the memo are lie largely in the subtext and motivations, it seems. When framed this way, it's easier to understand.

One issue I have is that the author implies the memo is alluding to a lack of aptitude, where in my reading of the original memo, the issue was of a lack of interest (wrt affinity towards people vs. objects and so forth). Perhaps that's six of one vs half a dozen of the other from a certain perspective, but it comes off as a misrepresentation.