Relative pronoun "That" in non-defining relative clauses

[Daniko900]

According to the grammar book "Advanced Grammar in Use", whose author is Martin Hewings and whose publisher is Cambridge University Press, in the Unit 53 section C, it says that the relative pronoun "that" is sometimes used instead of "which" for adding information about things in a non-defining relative clause.

"The Master's Course, which I took in 2001, is no longer taught" (or... that I took...)

Of course I prefer to use which, but I find this really weird, as other sources of grammar point out that "that" cannot be used at all in a non-defining relative clause. I have always learned that "that" cannot be used at all in this situation.

Edited May 13 by Daniko900

[Minoo]

Hello Dani,

 

As discussed in our session yesterday, I also find this very strange!

 

Best,

 

Minoo