Not talking, b-but - [- Robert struggles to convey this idea properly -] - ... understanding. There are... s-so many things that I take for... granted, that you should know, but... you d-do not. And while it is... n-no fault of your own, sometimes I am... stymied on how to e-explain things...

[He trails off, and then adds, more quietly:]

... And... it makes it more difficult to... u-understand you.