Response to "tonality" and "acutance"

I'm glad to see that everyone is as confused as I am. Tonality seems to imply lots of rich shades of gray. IMHO, that has more to do with lighting and subject than anything. All normally processed films and developers will produce a complete palette of grays from black to white. So what shade of gray is Rodinal incapable of producing? Yet tonality is real- I know it when I see it, and it took me near forever to come up with a film/developer combination that produces it more often than not. Hint- it wasn't Rodinal. If anyone has a clear definition of tonality that also holds up in sensitometric terms, I'd like to hear it, as most books treat it poorly if at all!

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