18. The system of claim 15 , wherein to collate the intent determination responses, the central device is further configured to terminate receiving the interleaved intent determination responses in response to a predetermined amount of time having lapsed, a predetermined amount of resources having been consumed, or one or more of the received interleaved intent determination responses meeting or exceeding an acceptable confidence level.
19. The system of claim 18 , wherein the input device that initially received the multi-modal natural language input is configured to communicate the multi-modal natural language input to the central device in response to an initial intent determination generated on the input device failing to meet or exceed the acceptable confidence level.