I'm with Krugman: "if this Politico piece is to be believed" (my italics) ... wherein Roger Simon relates that, reportedly--and that's a major advisory--Paul Ryan "has been marching around his campaign bus, saying things like, 'If Stench calls, take a message.' "
The problem with taking Simon's reported reporting seriously, rather than as second-hand sarcasm, is that the "stench" piece also presents a brief, straightforward history of PowerPoint's origins:
PowerPoint was released by Microsoft in 1990 as a way to euthanize cattle using a method less cruel than hitting them over the head with iron mallets. After PETA successfully argued in court that PowerPoint actually was more cruel than iron mallets, the program was adopted by corporations for slide show presentations.
I'm inclined, as any survivor of one of those godawful PP assaults would be, to accept Simon's history, and so accept The Stench. On the other hand, I would then have to allow Paul Ryan a few molecular synapses of lucidity; and there, I just cannot freely and fully go.