I think the concept of an accessible font is signaling. I don't think that Times New Roman is actually less legible than Calibri, and have never seen research claiming to find that Times New Roman in particular or serifs in general pose accessibility problems.
I’m not sure what you think I mean by “signaling”. This is a study of OCR performance, with no attempt to measure practical accessibility issues caused by the font difference which you and I agree is not big. I’m still very skeptical that even a single State Department employee’s ability to do a good job depends on which font the department uses.
If you say that it doesn’t matter whether changing the font had a large practical impact, because it’s a gesture in the right direction or helps build a culture of accessibility, I would classify that as signaling.
Classify it how you like, but a gesture towards building a culture of accessibility (if indeed that’s what this was) is hardly comparable to an attempt to score points against political opponents.
