[canjobear]

Given that you're communicating to an agent who can use context for disambiguation, all efficient languages will be ambiguous.

http://www.sciencedirect.com/science/article/pii/S0010027711... (Sorry for the paywall...)

So maybe Ithkuil isn't what a language should be after all. And maybe that's why no natural language looks like it...

[induscreep]

So basically language decoding is multimodal like one of the other comments here said? Like in digital communication, perfect decoding needs appropriate SNR (context) in addition to optimal spectral efficiency (conciseness/preciseness of the language). Interesting research.