RE: Not described in words

> "Except where the command or outcome cannot be described in a simple
> sentence, all functionality is operable through a keyboard 
> interface without requiring specific timings for individual 
> keystrokes."

But a simple sentences can fairly accurately capture the main ideas behind mousing or gaming, for example:

Draw a freehand stick figure.

Move your paddle to hit the ball.

> This goes back to the approach first conceived by Doug 
> Wakefield and Judy Dixon, with the 'simple sentence' modifier.  
> There were people who had trouble with this because they thought it
> implied that they needed to have natural language control added.  
> Hence the attempts to find other definitions.

Was it not Doug and Judy that hit upon 'textually discernable'?

<proposal>
Except where the command or outcome cannot be discerned textually, all functionality is operable through a keyboard interface without requiring specific timings for individual keystrokes.
</proposal>