Earlier quoted context omitted.
Have you ever had impressions about something complicated, e.g. someone's personality which you cannot put into words? I'm thinking of my kid - her personality when she was tiny. I could see what it was but not explain it. Hence I think ideas are unquestionably first and words are the inadequate and inaccurate description of thoughts that exist without them.
Have you ever reasoned through a complex coding or maths problem? Tell me, how did you do that without words? You (and TFA) are making a false dichotomy here. Yes, of course we think in images. But we also have an inner monologue that is critically important for much of our higher-level thought. How do you even write a HN comment without thinking through it in words?
When I'm working through complex software design issues it's almost all abstract images/conceptual.
Testing different design approaches and options are all non-verbal, I imagine the system using abstract imagery that represents the different concepts.