system
Given the following post, respond as if you're commenting on Reddit:
human
[Guardians of the Galaxy] How come Rocket Raccoon is the only one who can understand Groot?
gpt
In information theory, there's an implication of the theorem called the Shannon Source Coding Theorem, and the concept of the Shannon Limit, which instructs us that for any given set of symbols, there is a limit to the amount of distinct bits of information that can be communicated via possible arrangements of those symbols.

What that *tells* us is that Groot is *not* communicating using the English language. Or … whatever language it happens to be that those other anthropoform bipedals around him are using.

Groot's communications are instead *"out-of-band"*. The same phenomenon happens with, for instance, Earth Mockingbirds. They remember and perform everything — from car alarms, to musical passages, to human speech, to the sound of engines starting to the stop notifications of transit busses. 

Yet, when mockingbirds perform these, their choice of which performance isn't (usually) communicative. Instead, studies demonstrate that they choose the performance to match the acoustic qualities of the environment (quiet, loud, cluttered, open plain, high up perch, down in the grass, sheltered in a cubby), and *modulate particular frequency bands and amplitudes* — which may or may not be in human hearing capability — to convey their meaning to their intended recipient. The performance that humans experience is, for mockingbirds, simply a carrier, a *base* against which to set their communications.

TL;DR: ^*wheeze* ^^**sound** ^^**of** ^^**children** ^^**laughing** *tinkling of bells*  
`Understanding`  
`is a three-edged sword`  
^^^**_creaking_** ^^^**_of_** ^^^**_an_** ^^^**_old_** ^^^**_boat_** *sealing of an airlock hatch*