The ability to express oneself through natural language is tangentially related to its suitability as the foundation of a user interface.
A natural language should let you express your thoughts effectively. A user interface should let you accomplish the task you want effectively, within the limited capabilities of the program you are using. And it should expose those limits, not make you discover them through trial and error, as opaque, conversational interfaces do.
A natural language should let you express your thoughts effectively. A user interface should let you accomplish the task you want effectively, within the limited capabilities of the program you are using. And it should expose those limits, not make you discover them through trial and error, as opaque, conversational interfaces do.