18 year olds: 2 word vocabulary

I didn’t know that 2 words could convey so much! Here are the only two words that an 18 year old male uses with his family:
1. Meh
2. Grunt

Hmmm. Maybe the second one isn’t really a word. It’s just a sound and can vary a bit depending on time of day. Cool, a 1 word vocabulary! Wait…. is “meh” a word?

I’ve seen the grunt used to convey:
Good morning.
Hi, how was your trip?
I don’t like pork chops.
I’m feeling fine, thanks for asking.

Reid thinks it’s a binary language
Just to keep things interesting, grunt (or 0) does not always mean No. Depends on the context.

What’s your theory?