[cryptotype]

Grammar is absolutely relevant in science, math and various other fields. Noone wants to have to parse ungrammatical documentation or scientific papers.

It's certainly possible to get by in STEM with poor grammar, but it is harder to excel that way. Grammar below a certain threshold impedes natural language communication, which is important even in technical fields.

[sbilstein]

There's a really big difference between terse academic written language and the kind of mode switching that goes on when speaking out loud for bilingual speakers. Most people have a much easier time following rules of grammar when writing language than when speaking it. Papers in english from academics around the world are often more readable than their spoken english.

[knughit]

What is good grammar? Good grammar is simply however the current people in power speak.

"A language is a dialect with an Army and a Navy".

[cryptotype]

Good grammar is something that helps large groups of people understand each other quickly and clearly. It helps those armies and navies succeed.

[startling]

> Good grammar is something that helps large groups of people understand each other quickly and clearly. It helps those armies and navies succeed.

Sure, but this has little to do with perception of good grammar (in the US at least).