[Question ] about the error analysis

[劉美君]

Dear Funknet people,

 

I have been confusing while I tagging the error type for the data in learner
corpus  

 

For some data are not considered as "Error" while it is spoken, and some
data are not good but acceptable in written form.

 

It is not a clear boundary between right sentence and wrong sentence.

 

So I wonder anyone can share your comment on my struggle?

 

Sincerely,

LUZ