> trying to be convincing on technical issues when you can't understand fundamentals of English is not persuasive at all.
Note to disprove your point but there are plenty of very technically capable people who learn English as a second, third, fourth language. In fact I would say in technical settings, such as here, that this is statistically more common than a native English speaker with poor writing skills.
There is/are and their sound very different in other languages, so I would say that people who speak English as a second language generally make these types of mistakes less often than natural speakers who learned speaking English many years before writing. (We make other types of mistakes more often though).
As a non-native Enlish speaker I'd like an n=1 'experience' to your n=1 'would say': the English is in my head first and then in writing. So at the time of writing there and their already sound alike and van be easily mixed up
This is true, but I (and you) learned to say and read/write these words at the same time, so we have an advantage over native English speakers in differentiating them.
At the same time the poster had a larger vocabulary than I have (which is true for native speakers generally, as I try to stay within simple English).
Note to disprove your point but there are plenty of very technically capable people who learn English as a second, third, fourth language. In fact I would say in technical settings, such as here, that this is statistically more common than a native English speaker with poor writing skills.